US3225114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving young's modulus of polyamide by condensation in presence of polycarbonate
Assignee: Monsanto Co
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Filing: 1964-07-21
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Granted: 1965-12-21
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Expires: 1984-07-21
Abstract
No abstract record available.
Inventors
- 👤 Richard D Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:36
CPC Classifications
C; C08; C08L; C08L77/00; C08G; C08G69/00; C08G69/02; C08G69/44; C08L77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR INCREASING THE MODULUS OF ELASTICITY OF FIBER-FORMING SYNTHETIC LINEAR POLYCARBONAMIDES WHICH COMPRISES SUBJECTING POLYAMIDE-FORMING REACTANTS WHICH ARE CAPABLE OF FORMING POLYAMIDES HAVING RECURRING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE POLYMER CHAIN, WHICH GROUPS ARE SEPARATED BY AT LEAST TWO CARBON ATOMS, TO A CONDENSATION REACTION BY HEAT TREATMENT AT A TEMPERATURE IN THE RANGE OF FROM 180*C. TO 300*C.; THEREAFTER REACTING THE REACTION MASS AT A POINT BEFORE SAID REACTION MASS HAS REACHED A RELATIVE VISCOSITY OF 20 WITH A POLYCARBONATE HAVING A MOLECULAR WEIGHTIN EXCESS OF 5,000 AND IN AN AMOUNT OF FROM 1.5 TO 20 PERCENT BASED ON THE WEIGHT OF THE POLYAMIDE TO BE FORMED.
Claim 2
Dependent Claim
113 words
A PROCESS FOR INCREASING THE MODULUS OF ELASTICITY OF FIBER-FORMING SYNTHETIC LINEAR POLYCARBONAMIDES WHICH COMPRISES SUBJECTING POLYAMIDE-FORMING REACTANTS WHICH ARE CAPABLE OF FORMING POLYAMIDES HAVING RECURRING CARBONAMIDE GROUPS AS AN INTEGRAL PART OF THE POLYMER CHAIN, WHICH GROUPS ARE SEPARATED BY AT LEAST TWO CARBON ATOMS, TO A CONDENSATION REACTION BY HEAT TREATMENT AT A TEMPERATURE IN THE RANGE OF FROM 180*C. TO 300*C.; THEREAFTER REACTING THE REACTION MASS AT A POINT BEFORE SAID REACTION MASS HAS REACHED A RELATIVE VISCOSITY OF 20 WITH A POLYCARBONATE HAVING A MOLECULAR WEIGHTIN EXCESS OF 5,000 AND IN AN AMOUNT OF FROM 1.5 TO 20 PERCENT BASED ON THE WEIGHT OF THE POLYAMIDE TO BE FORMED.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |