Patent US3119794A successfully refreshed from Google Patents.
US3119794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly-gamma-esters of optically active glutamic acid
Assignee: California Research LLC
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Filing: 1960-09-06
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Granted: 1964-01-28
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Expires: 1980-09-06
Abstract
No abstract record available.
Inventors
- 👤 Vries Louis De
- 👤 John R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:43
CPC Classifications
C; C10; C10M; C10M119/00; C10M119/24; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/10; C10M2217/00; C10M2217/04; C10M2217/044; C10M2217/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
POLY-GAMMA-ESTERS OF OPTICALLY ACTIVE GLUTAMIC ACID CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
15 words
POLY-GAMMA-ESTERS OF OPTICALLY ACTIVE GLUTAMIC ACID CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2438091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |