This is based on a talk given by Philip Webber at the CIPA
Life Sciences Conference on 15 November 2013.
1. As background to
human embryo stem cells: the Biotech Directive lists inventions which are seen
as immoral. This was brought into the
Rules of the EPC in 1999. The Enlarged
Board of the EPO decided in WARF G2/06 in 2008 that if an invention required a
human embryo to be destroyed then it was not patentable, though it seemed from
the decision that if appropriate embryo stem cell lines were publically
available at the priority date then the invention was patentable, even if
creation of those cell lines required destruction of an embryo.
However in 2011 the CJEU decided in C34/10 Brustle that if
the invention made use of embryo stem cells that had required destruction of an
embryo at any stage then it was not
patentable, i.e. a stricter test than the EPO set in WARF G2/06. In 2012 the EPO informally indicated that it would
follow the CJEU’s decision.
2. There are 3 dates
which are important when looking at the patentability of embryo stem
cells. Firstly, embryo stem cell lines
were first made in December 1997. Secondly,
the EPO accepts that human embryo stem cell lines were publically available
from May 2003. Thirdly, in February 2008
a paper was published showing how embryo stem cell lines could be made without destroying
an embryo, essentially by taking a cell from an 8 cell embryo and letting the
remaining 7 cells continue to develop.
3. In 2013 there was
a new referral to the CJEU from the UK on whether a parthenote is a human
embryo (presently pending as C-364/14).
The patent application concerned activating an unfertilised oocyte and
causing it to develop into a parthenote.
Embryo stem cells can be produced from the resultant parthenote, but the
parthenote is incapable of developing into a human. The Advocate General’s opinion in the Brustle
decision had been in favour of a test requiring the embryo to be capable of
forming a viable human, but the subsequent CJEU decision did not include this.
4. The German Brustle
patent has now been granted with a disclaimer to embryonic stem cell lines which
are derived by destruction of a human embryo.
There is a corresponding European patent which has the same disclaimer
and which has been opposed by Geron on the grounds of morality and insufficiency. Geron argued that at the priority date it was
not possible to make embryo stem cell lines without destroying an embryo. The opposition division revoked the patent in
June 13 on the basis that the sufficiency issue led to the disclaimer adding
matter. This will now go to appeal.
It is clear from European Patent No. 2283117 granted in October
2013 that the EPO is granting cases filed after 2008 without an appropriate disclaimer
being required.
5. In the UK High
Court , Lilly v Janssen concerned treating Alzheimer’s with an antibody to
amyloid-β. The prior art, Konig, disclosed
the concept of using such antibodies to treat Alzheimer’s but did not provide any
data. The question was whether this disclosure
was novelty-destroying. The UKIPO Guidelines
on medical use claims say that there does not need to be disclosure of clinical
trials in a prior art document for it to be novelty destroying, but there is no
further clarification of what sort of disclosure would be
novelty-destroying. The EPO decision
T1437/07 says the sufficiency test must be identical for the prior art and for
the patent, and thus there needs to be credible disclosure of the treatment. A previous UK House of Lords decision, Synthon
v SmithKline Beecham had said that anticipation and enablement must be same
test. Ultimately the UK Court decided in
Lilly v Janssen that since Konig had not have experimental data it is
speculative, and therefore not novelty destroying. Given there were reasons to expect the
antibodies would not work the claims were also inventive over Konig.
6. The Court in Lilly
v Janssen also considered sufficiency, both classical and Biogen insufficiency
(the latter corresponds to the EPO’s Agrevo test). For Biogen insufficiency the court asked ‘do
all antibodies against amyloid-β work?’
Given that only antibodies to the N terminus of the protein would work
the specification did not make it plausible that any antibody against amyloid-β
could be used and therefore the patent was insufficient. The Court also considered classical
insufficiency asking whether it was undue burden to make therapeutic
antibodies. The sequence of the
antibodies or deposits of them were not available. The evidence showed they would require 30
months to make. However there were
doubts about efficacy in mice and human trials.
There had been success in a phase II trial, but failure in a phase III
trial. Given all of this it was decided
the patent was also insufficient for classical sufficiency.
7. The UK IPO case Aueon
(BL O/248/13) concerned a method of diagnosing cancer that included a step of checking a database to identify
potential treatment options. The
applicant argued that one can have technical and nontechnical steps in a
diagnostic claim given the EPO decision G1/04.
However the hearing officer treated the invention as computer program
and used the approach in Aerotel, leading to refusal.
8. The UK IPO case Lalvani
(BL O/220/13) concerned inventive step of a formulation for lactating mothers. Essentially the hearing officer said that all
of the ingredients recited in the claim would be obvious to use in the
formulation, and in the absence of showing synergy the invention was
obvious. The applicant’s arguments that
there was bound to be synergy in such a biological system was rejected in the absence
of data.
9. The UK High Court case
Glenmark v Wellcome concerned the obviousness of an antimalarial with two
components in in a particular ratio. The
Court said that if there was an urgent need the skilled person would pursue a ‘hope
to succeed’ which is different from the usual test of reasonable expectation. The claims were found to be obvious in view
of a prior art oral presentation.
10. There is the perception that the EPO is getting stricter
every year on added matter. However recent
decisions T667/08 and T2619/11 may make it easier for applicants. Essentially these require the EPO to look at the
application in its entirety, and not just at the literal wording. The EPO Guidelines have been changed as a
result to make it clear that implicit features should be taken into account
when judging added matter.
You may also wish to see related articles Top
10 Points from EPO Case Law in 2013 and Top
10 Points from IPO Decisions in 2013.