US3575935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide molding plastics
Assignee: Eastman Kodak Co
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Filing: 1968-08-08
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Granted: 1971-04-20
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Expires: 1988-08-08
Abstract
Abstract POLYAMIDES USEFUL AS MOLDING PLASTICS ARE DERIVED FROM (A) AT LEAST ONE AROMATIC OR ALICYCLIC DICARBOXYLIC ACID AND (B) 4,4-DIMETHYL-1,7-HEPTANEDIAMINE AND/OR 4METHYL-4-EHTYL-1,7-HEPTANEDIAMINE.
Inventors
- 👤 Edward U Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:32
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |