Patent US2920111A successfully refreshed from Google Patents.
US2920111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fluoroiodohydrocarbons
Assignee: Pennwalt Corp
•
Filing: 1957-07-15
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Granted: 1960-01-05
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Braid Milton
- 👤 Hauptschein Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:05
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/013; C07C17/04; C07C17/093; C07C17/20; C07C17/202; C07C17/204
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE METHOD WHICH COMPRISES CONTACTING A 1,1-DIFLUORO-1-ALKENE OF THE FORMULA
Claim 2
Independent Claim
10 words
THE METHOD WHICH COMPRISES CONTACTING A 1,1-DIFLUORO-1-ALKENE OF THE FORMULA
References Cited (Backward Citations)
US2424667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |