Patent US3234152A successfully refreshed from Google Patents.
US3234152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed fast and slow cocatalysts for polymerizing and foaming caprolactam
Assignee: EIDP Inc
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Filing: 1963-04-04
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Granted: 1966-02-08
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Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 Mack F Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:40
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/106; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20; C08J2377/00; C08J2377/02; Y; Y10; Y10S; Y10S264/00; Y10S264/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN THE PROCESS OF MAKINE FOAMED POLYCARPROLACTAM WHICH COMPRISES HEATING A MIXTURE OF $-CAPROLACTAM AND AT LEAST ALLYLIC AZIDE BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF 8 TO 24 CARBON ATOM ALIPHATIC ALLYLIC AZIDES AND BENZYL AZIDES IN THE PRESENCE OF A LACTAM-BASE SALT CATALYST AND A COCOTALYST, THE IMPROVEMENT WHICH COMPRISES ADDING ACOCOTALYST MIXTURE OF (A) AT LEAST ONE OF THE GROUP CONSISTING OF 1,1,3,3-TETRAMETHYLCYCLOBUTANEDIONE AND 2,2,4-TRIMETHYL-3-HYDORXY-PENTENOIC ACID B-LACTONE, AND (B) AT LEAST ONE FAST COCOATALYST HAVING A NO-FLOW TIME OF LESS THAN ABOUT 1.5 MINUTES.
Claim 2
Dependent Claim
88 words
IN THE PROCESS OF MAKINE FOAMED POLYCARPROLACTAM WHICH COMPRISES HEATING A MIXTURE OF $-CAPROLACTAM AND AT LEAST ALLYLIC AZIDE BLOWING AGENT SELECTED FROM THE GROUP CONSISTING OF 8 TO 24 CARBON ATOM ALIPHATIC ALLYLIC AZIDES AND BENZYL AZIDES IN THE PRESENCE OF A LACTAM-BASE SALT CATALYST AND A COCOTALYST, THE IMPROVEMENT WHICH COMPRISES ADDING ACOCOTALYST MIXTURE OF (A) AT LEAST ONE OF THE GROUP CONSISTING OF 1,1,3,3-TETRAMETHYLCYCLOBUTANEDIONE AND 2,2,4-TRIMETHYL-3-HYDORXY-PENTENOIC ACID B-LACTONE, AND (B) AT LEAST ONE FAST COCOATALYST HAVING A NO-FLOW TIME OF LESS THAN ABOUT 1.5 MINUTES.
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) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |