US3455885A
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US
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Anionic polymerization of lactams with n-chlorocarbonyl - 2 - chloro-2,3-dehydropolymethyleneimine as cocatalyst
Assignee: UBE KOGYO KK
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Filing: 1966-08-17
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Granted: 1969-07-15
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Expires: 1986-08-17
Abstract
No abstract record available.
Inventors
- 👤 Katsuaki Oka
- 👤 Shohei Tokiura
- 👤 Tatsuo Yamamoto
- 👤 Yoshikazu Sasaki
- 👤 Hideo Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:38
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/08; C08G69/14; C08G69/16; C08G69/18; C08G69/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3017391A
Cited
US3138576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |