US2681940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated pentenes
Assignee: Dow Silicones Corp
•
Filing: 1951-12-26
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Granted: 1954-06-22
•
Expires: 1971-12-26
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
- 👤 Arthur F Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/208; C07C21/00; C07C21/02; C07C21/18; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |