Patent US3206439A successfully refreshed from Google Patents.
US3206439A
Expired / Lapsed
US
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Ordered copolyamides from aromatic amino acids
Assignee: Wyeth Holdings LLC
•
Filing: 1961-12-20
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Granted: 1965-09-14
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Fredric E Detoro
- 👤 Kraft Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:07
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/006; C08; C08G; C08G69/00; C08G69/02; C08G69/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
AN ORDERED POLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
11 words
AN ORDERED POLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF THE FORMULA
References Cited (Backward Citations)
CA618244A
Cited
US2071253A
Cited
US2356702A
Cited
US2688011A
Cited
US2868770A
Cited
US2933491A
Cited
US2865912A
Cited
US2914552A
Cited
US2905706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |