Tri-functional antibody-like compounds as a combined diagnostic and therapeutics agent
CA 2037835 A1 · Owner: Hybritech Incorporated · Inventors: Huang, Ann E.; Ahlem, Clarence N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention has multiple aspects. In its first aspect the present invention is directed to a trifunctional antibody-like compound that has tissue organ, cell or molecule, specificity and which is capable of being bifunctional when immobilized, via binding, at the tissue organ, cell or molecule, for which it has specificity. In particular the present invention, is directed to a trifunctional antibody-like compound of Formula 1:, (I), wherein L is one or two moieties for cross-linking F1ab', F2ab' and F3ab';, wherein F1ab' is an Fab'-like fragment of a polyclonal or monoclonal antibody having specificity for an antigen expressed by the organ, tissue, cell or molecule of interest; …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.