US3213064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of oxetanes and aldehyde hydrates
Assignee: Wyeth Holdings LLC
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Filing: 1961-12-08
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Granted: 1965-10-19
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Expires: 1981-12-08
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W R Song
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:22
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/18
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
17 words
A METHOD FOR THE PRODUCTION OF A POLYMER WHICH COMPRISES COPOLYMERIZING AN OXETANE COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |