US3838111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amorphous copolyamide from bis-(4-aminocyclohexyl)methane,phenylindanedicarboxylic acid and alkane dicarboxylic acid
Assignee: Phillips Petroleum Co
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Filing: 1971-12-21
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Granted: 1974-09-24
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Expires: 1991-12-21
Abstract
Abstract SUBSTANTIALLY AMORPHOUS OPTICALLY CLEAR POLYAMIDES ARE PRODUCED FROM A BIS(4-AMINOCYCLOHEXYL)METHANE OR METHYL DERIVATIVE THEREOF AND A PHENYLINDANEDICARBOXYLIC ACID OR ALKYL DERIVATIVE THEREOF. COPOLYAMIDES HAVING DESIRABLE PROCESSING PROPERTIES ARE PRODUCED BY POLYMERIZING THE ABOVE MONOMERS AND AT LEAST ONE STRAIGHT CHAIN DICARBOXYLIC ACID AS AN ADDITIONAL MONOMER. THE RESULTING POLYMERS ARE USEFUL AS FIBERS AS WELL AS MOLDING RESINS.
Inventors
- 👤 R Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:35
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/265
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |