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Patent US2786045A successfully refreshed from Google Patents.
US2786045A
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Hydroxyacyl-amino acids and their polymers
Assignee: Tee Pak Inc
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Filing: 1953-01-21
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Granted: 1957-03-19
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Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph S Chirtel
- 👤 Arthur M Mark
- 👤 Brelant Sam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:26
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; C08G63/00; C08G63/68; C08G63/685; C08G63/6852
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
HYDROXYACYL-AMINO ACIDS HAVING THE STRUCTRAL FORMULA:
Claim 2
Dependent Claim
6 words
HYDROXYACYL-AMINO ACIDS HAVING THE STRUCTRAL FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |