Patent US3012990A successfully refreshed from Google Patents.
US3012990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moldable copolymers
Assignee: Celanese Corp
•
Filing: 1959-03-25
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Granted: 1961-12-12
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Expires: 1979-03-25
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Kray
- 👤 Charles A Defazio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:35
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/06; C08G2/10; C08G2/18; C08G2/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A COPOLYMER CONSISTING ESSENTIALLY OF RECURRING OXYMETHYLENE GROUPS AND 0.005 TO 50 MOL PERCENT OF RECURRING GROUPS OF THE FORMULA
Claim 2
Dependent Claim
20 words
A COPOLYMER CONSISTING ESSENTIALLY OF RECURRING OXYMETHYLENE GROUPS AND 0.005 TO 50 MOL PERCENT OF RECURRING GROUPS OF THE FORMULA
References Cited (Backward Citations)
US2373561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |