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US2465339A
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Method for preparing fluorine-substituted orthosilicic acid esters
Assignee: EIDP Inc
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Filing: 1944-08-15
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Granted: 1949-03-29
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Expires: 1964-08-15
Abstract
No abstract record available.
Inventors
- 👤 Richard S Schreiber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:16
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/025
Claims Analysis
Total Claims: 0
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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) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |