US3427289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled anionic polymerization of higher lactams
Assignee: Polysar Ltd
•
Filing: 1967-03-14
•
Granted: 1969-02-11
•
Expires: 1987-03-14
Abstract
No abstract record available.
Inventors
- 👤 Robert Edmund Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
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)
US3028369A
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US3015652A
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US3037003A
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US3057830A
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US3138574A
Cited
US3121768A
Cited
US3234152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |