Patent US3738950A successfully refreshed from Google Patents.
US3738950A
Expired / Lapsed
US
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Polyamides modified with adipic acid and process for their preparation
Assignee: Union Camp Corp
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Filing: 1971-06-14
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Granted: 1973-06-12
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Expires: 1991-06-14
Abstract
Abstract THIS INVENTION RELATES TO USEFUL POLYMERIC FAT ACID POLYAMIDE COMPOSITIONS MODIFIED WITH ADIPIC ACID AND A METHOD FOR THEIR PREPARATION. THE ADIPIC ACID-MODIFIED POLYAMIDE RESINS ARE DERIVED FROM POLYMERIC FAT ACIDS AND PIPERAZINE OR PIPERAZINE DERIVATIVES AND HAVE AN EXCELLENT BALANCE OF PHYSICAL PROPERTIES, SOFTENING POINT AND ADHESIVE PROPERTIES MAKING THEM SUITABLE FOR HOT MELT BONDING OF VINYL-BASED SUBSTRATES.
Inventors
- 👤 R Sturwold
- 👤 H Sharkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:21
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/34
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |