US3322696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed polylactams
Assignee: EIDP Inc
•
Filing: 1964-05-06
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Granted: 1967-05-30
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Expires: 1984-05-06
Abstract
No abstract record available.
Inventors
- 👤 Charles F Fisher
- 👤 Mack F Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08J9/06; C08J9/10; C08J9/106; C08J2377/00; C08J2377/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS FOR THE PRODUCTION OF POLYAMIDE FOAMS BY THE ANIONIC COCATALYZED POLYMERIZATION OF LACTAM HAVING 3 TO 12 CARBON ATOMS IN THE LACTAM RING, THE IMPROVEMENT COMPRISING CONDUCTING THE POLYMERIZATIN REACTION IN THE PRESENCE OF A BLOWING AGENT WHICH COMPRISES AT LEAST ONE ALIPHATIC HYDROCARBON HAVING FROM 2 TO 7 CARBON ATOMS AND AN ALLYLIC AZIDE HAVING THE STRUCTURE
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR THE PRODUCTION OF POLYAMIDE FOAMS BY THE ANIONIC COCATALYZED POLYMERIZATION OF LACTAM HAVING 3 TO 12 CARBON ATOMS IN THE LACTAM RING, THE IMPROVEMENT COMPRISING CONDUCTING THE POLYMERIZATIN REACTION IN THE PRESENCE OF A BLOWING AGENT WHICH COMPRISES AT LEAST ONE ALIPHATIC HYDROCARBON HAVING FROM 2 TO 7 CARBON ATOMS AND AN ALLYLIC AZIDE HAVING THE STRUCTURE
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |