Patent US2980695A successfully refreshed from Google Patents.
US2980695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyfluoro-1, 3-dithietanes and their preparation
Assignee: EIDP Inc
•
Filing: 1957-06-12
•
Granted: 1961-04-18
•
Expires: 1977-06-12
Abstract
No abstract record available.
Inventors
- 👤 Middleton William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:42
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/02; C01; C01B; C01B32/00; C01B32/70; C07; C07D; C07D339/00; C08G75/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
POLYFLUORO-1,3-DITHIETANES SELECTED FROM THE CLASS CONSISTING OF TETRAFLUORO-1,3-DITHIETANE AND MONOCHLOROTRIFLUORO-1,3-DITHIETANE.
Claim 2
Dependent Claim
10 words
POLYFLUORO-1,3-DITHIETANES SELECTED FROM THE CLASS CONSISTING OF TETRAFLUORO-1,3-DITHIETANE AND MONOCHLOROTRIFLUORO-1,3-DITHIETANE.
References Cited (Backward Citations)
US2562994A
Cited
US2701253A
Cited
US2055617A
Cited
US2538941A
Cited
US2570793A
Cited
US2534366A
Cited
US2662899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |