US3759877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrinkable film forming copolyamides prepared by copolymerizing omegaaminoundecanoic acid and the salt of a dicar boxylic acid and trimethylhexamethylene diamine
Assignee: Dow Produktions und Vertriebs GmbH and Co OHG
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Filing: 1972-02-24
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Granted: 1973-09-18
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Expires: 1992-02-24
Abstract
Abstract SHRINKABLE FILM-FORMING COPOLYAMIDES WHICH ARE GLASSCLEAR IN APPEARANCE AND WHICH ARE OBTAINED BY POLYCONDENSATION OF 65-85% BY WEIGHT OF W-AMINO-UNDECANOIC ACID AND 35-15% BY WEIGHT OF A SALT OF A DICARBOXYLIC ACID AND A DIAMINE, BETWEEN 50 AND 100 MOL PERCENT OF THE DIAMINE BEING TRIMETHYLHEXAMETHYLENE DIAMINE, AND FILMS PRODUCED THEREFROM.
Inventors
- 👤 H Huhn
- 👤 L Hoppe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:54
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/36
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |