US3086962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerizing higher lactams
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-10-03
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Granted: 1963-04-23
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Expires: 1978-10-03
Abstract
No abstract record available.
Inventors
- 👤 Edward H Mottus
- 👤 Ross M Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:28
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR EFFECTING THE POLYMERIZATION OF A HIGHER LACTAM CONTAINING AT LEAST 6 CARBON ATOMS IN THE LACTAM RING, COMPRISING THE ANIONIC POLYMERIZATION OF THE SAID LACTAM AT A TEMPERATURE OF FROM ABOUT 120* C. UP TO ABOUT 250* C. IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF FROM ABOUT 0.05 UP TO ABOUT 20 MOLE PERCENT, BASED ON THE LACTAM, OF AN N,N''-SUBSTITUTED UREA PROMOTER HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
71 words
A PROCESS FOR EFFECTING THE POLYMERIZATION OF A HIGHER LACTAM CONTAINING AT LEAST 6 CARBON ATOMS IN THE LACTAM RING, COMPRISING THE ANIONIC POLYMERIZATION OF THE SAID LACTAM AT A TEMPERATURE OF FROM ABOUT 120* C. UP TO ABOUT 250* C. IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF FROM ABOUT 0.05 UP TO ABOUT 20 MOLE PERCENT, BASED ON THE LACTAM, OF AN N,N''-SUBSTITUTED UREA PROMOTER HAVING THE STRUCTURAL FORMULA
References Cited (Backward Citations)
US2241321A
Cited
US2867805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |