US3207713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of polymerizing and foaming a lactam using an organic carbonate cocatalyst
Assignee: EIDP Inc
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Filing: 1962-12-07
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Granted: 1965-09-21
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Expires: 1982-12-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas J Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN THE PROCESS FOR THE POLYMERIZATION OF LACTAMS HAVING FROM 3 TO 12 CARBON ATOMS IN THE LACTAM RING TO POLYAMIDES WHICH COMPRISES HEATING SAID LACTAM IN THE PRESENCE OF A LACTAM-BASE SALT MADE FROM ABOUT 0.1 TO 10 MOLE PERCENT BASE, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE LACTAM PRIOR TO POLYMERIZATION AN ORGANIC CARBONATE COCATALYST HAVING AT LEAST ONE CARBOCYCLIC AROMATIC GROUP BONDED THROUGH AROMATIC CARBON TO AN OXYGEN OF A CARBONATE GROUP.
Claim 2
Dependent Claim
75 words
IN THE PROCESS FOR THE POLYMERIZATION OF LACTAMS HAVING FROM 3 TO 12 CARBON ATOMS IN THE LACTAM RING TO POLYAMIDES WHICH COMPRISES HEATING SAID LACTAM IN THE PRESENCE OF A LACTAM-BASE SALT MADE FROM ABOUT 0.1 TO 10 MOLE PERCENT BASE, THE IMPROVEMENT WHICH COMPRISES ADDING TO THE LACTAM PRIOR TO POLYMERIZATION AN ORGANIC CARBONATE COCATALYST HAVING AT LEAST ONE CARBOCYCLIC AROMATIC GROUP BONDED THROUGH AROMATIC CARBON TO AN OXYGEN OF A CARBONATE GROUP.
References Cited (Backward Citations)
US3060135A
Cited
US3065189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |