US3781234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible polyamide hot melt adhesive made from ethylene diamine and an acid component containing a polymeric fatty acid and heptadecane dicarboxylic acid
Assignee: Bayer Pharma AG
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Filing: 1972-06-20
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Granted: 1973-12-25
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Expires: 1992-06-20
Abstract
Abstract FLEXIBLE POLYAMIDES, SUITABLE FOR USE AS HOT MELT ADHESIVES AND AS COATING MATERIALS, PREPARED BY CONDENSING ETHYLENE DIAMINE WITH AN ACID COMPONENT COMPRISING 1,8AND/OR 1,9-HEPTADECANE DICARBOXYLIC ACID, A DIMERIZED FATTY ACID, AND, OPTIONALLY, A FURTHER CODICARBOXYLIC ACID HAVING 7 TO 20 CARBON ATOMS.
Inventors
- 👤 M Drawert
- 👤 E Griebsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |