US2907755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of lactams in presence of carbon monoxide
Assignee: BASF SE
•
Filing: 1957-11-05
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Granted: 1959-10-06
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Expires: 1977-11-05
Abstract
No abstract record available.
Inventors
- 👤 Lautenschlager Hans
- 👤 Friederich Herbert
- 👤 Schmidt Wolfgang
- 👤 Dachs Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:10
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
17 words
IN THE POLYMERISATION OF A LACTAM SELECTED FROM THE GROUP CONSISTING OF LACTAMS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
17 words
IN THE POLYMERISATION OF A LACTAM SELECTED FROM THE GROUP CONSISTING OF LACTAMS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2277152A
Cited
US2809958A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |