US3300469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L-lysyl-l-phenylalanyl-l-isoleucyl-glycyl-l-leucyl-l-methioninamide, derivatives thereof and intermediates in the preparation thereof
Assignee: Pfizer Italia SRL
•
Filing: 1964-05-15
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Granted: 1967-01-24
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Expires: 1984-05-15
Abstract
No abstract record available.
Inventors
- 👤 Bernardi Luigi
- 👤 Castiglione Roberto De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:53
CPC Classifications
C; C07; C07K; C07K7/00; C07K7/04; C07K7/22; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
THE PROTECTED HEXAPEPTIDE HAVING THE STRUCTURE LLYSYL-L-PHENYLALANYL-L - ISOLEUCYL - GLYCYL - L - LEUCYL - LMETHIONINAMIDE WHEREIN THE TWO AMINO GROUPS OF LYSINE ARE BLOCKED BY A PROTECTING GROUP SELECTED FROM THE GROUP CONSISTING OF TRITYL, TOSYL, PHTHALYL, CARBOBENZYLOXY, CARBO-T,BUTOXY, TRIFLURORACETYL, AND FORMYL.
Claim 2
Dependent Claim
44 words
THE PROTECTED HEXAPEPTIDE HAVING THE STRUCTURE LLYSYL-L-PHENYLALANYL-L - ISOLEUCYL - GLYCYL - L - LEUCYL - LMETHIONINAMIDE WHEREIN THE TWO AMINO GROUPS OF LYSINE ARE BLOCKED BY A PROTECTING GROUP SELECTED FROM THE GROUP CONSISTING OF TRITYL, TOSYL, PHTHALYL, CARBOBENZYLOXY, CARBO-T,BUTOXY, TRIFLURORACETYL, AND FORMYL.
References Cited (Backward Citations)
US2900375A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |