Patent US2964507A successfully refreshed from Google Patents.
US2964507A
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1, 1-difluoro-2-methylene-3-difluoromethylene cyclobutane and polymers thereof
Assignee: EIDP Inc
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Filing: 1956-12-17
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Granted: 1960-12-13
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter Henry Knoth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:37
CPC Classifications
C; C08; C08F; C08F32/00; C08F32/02; C08F32/04; C07; C07C; C07C17/00; C07C17/26; C07C17/272; C07C17/278; C07C17/281; C07C17/38; C07C17/42; C07C23/00; C07C23/02; C07C23/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
1-DIFLUORO-2-METHYLENE-3 - DIFLUOROMETHYLENECYCLOBUTANE.
Claim 2
Dependent Claim
3 words
1-DIFLUORO-2-METHYLENE-3 - DIFLUOROMETHYLENECYCLOBUTANE.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |