US3513135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anionic polymerization of a lactam in the presence of n-mono substituted carboxylic acid amides
Assignee: Bayer AG
•
Filing: 1969-05-07
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Granted: 1970-05-19
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Expires: 1989-05-07
Abstract
No abstract record available.
Inventors
- 👤 Karl-Heinz Hermann
- 👤 Hermann Schnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:29
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3015652A
Cited
US3017391A
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US3037003A
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US3057830A
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US3211706A
Cited
FR1386866A
Cited
US3359227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |