US3455887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of vinyl esters of lower alkanoic acid,vinyl esters of tertiary alkanoic and lower alkyl methacrylates
Assignee: Celanese Corp
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Filing: 1966-06-21
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Granted: 1969-07-15
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Expires: 1986-06-21
Abstract
No abstract record available.
Inventors
- 👤 Eli Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:56
CPC Classifications
C; C08; C08F; C08F218/00; C08F218/02; C08F218/04; C08F218/10; C08F18/00; C08F18/02; C08F18/04
Claims Analysis
Total Claims: 0
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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) | 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 |