US2696482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparent synthetic linear polyamide and process for producing same
Assignee: EIDP Inc
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Filing: 1951-07-19
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Granted: 1954-12-07
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Expires: 1971-07-19
Abstract
No abstract record available.
Inventors
- 👤 Donald C Pease
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR MAKING A TRANSPARENT POLYAMIDE WHICH COMPRISES HEATING, IN A MOLAR RATIO WHICH IS WITHIN 0.5% OF EQUIMOLAR AMOUNTS, A MIXTURE OF ISOMERIC BAS(4-AMINOCYCLOHEXYL) METHANES WHICH IS LIQUID AT 25* C., AND AN ISOPHTHALIC ACID COMPOUND OF THE CLASS CONSISTING OF ISOPHTHALIC ACID AND AMIDE-FORMING DERIVATIVES THEREOF, AT A TEMPERATURE OF FROM 100* C. TO 350* C. WHEREBY A TRANSPARENT POLYAMIDE IN WHICH THE POLYAMIDE-FORMING INGREDIENTS CONSIST ESSENTIALLY OF THE SAID ISOPHTHALIC ACID COMPOUND AND THE SAID ISOMERIC BIS(4-AMINOCYCLOHEXYL) METHANES IS OBTAINED.
Claim 2
Dependent Claim
84 words
A PROCESS FOR MAKING A TRANSPARENT POLYAMIDE WHICH COMPRISES HEATING, IN A MOLAR RATIO WHICH IS WITHIN 0.5% OF EQUIMOLAR AMOUNTS, A MIXTURE OF ISOMERIC BAS(4-AMINOCYCLOHEXYL) METHANES WHICH IS LIQUID AT 25* C., AND AN ISOPHTHALIC ACID COMPOUND OF THE CLASS CONSISTING OF ISOPHTHALIC ACID AND AMIDE-FORMING DERIVATIVES THEREOF, AT A TEMPERATURE OF FROM 100* C. TO 350* C. WHEREBY A TRANSPARENT POLYAMIDE IN WHICH THE POLYAMIDE-FORMING INGREDIENTS CONSIST ESSENTIALLY OF THE SAID ISOPHTHALIC ACID COMPOUND AND THE SAID ISOMERIC BIS(4-AMINOCYCLOHEXYL) METHANES IS OBTAINED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-06 | 1958-06-07 | 1958-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-06 | 1962-06-07 | 1962-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-06 | 1966-06-07 | 1966-12-07 | $7700.00 | Window Closed / Lapsed |