US2956984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyesters from n, n'-bis(carboxy substituted organic radical)-p-xylylenediamine
Assignee: Eastman Kodak Co
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Filing: 1957-03-05
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Granted: 1960-10-18
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Expires: 1977-03-05
Abstract
No abstract record available.
Inventors
- 👤 Delbert D Reynolds
- 👤 Jack L R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:17
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A LINEAR HIGHLY POLYMERIC POLYESTER OF (A) FROM 70 TO 100 MOLE PERCENT OF A NITROGENOUS DICARBOXYLIC ACID HAVING THE FOLLOWING GENERAL FORMULA
Claim 2
Dependent Claim
23 words
A LINEAR HIGHLY POLYMERIC POLYESTER OF (A) FROM 70 TO 100 MOLE PERCENT OF A NITROGENOUS DICARBOXYLIC ACID HAVING THE FOLLOWING GENERAL 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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |