US2650934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of silicic acids and methods of making the same
Assignee: Ellis Foster Co
•
Filing: 1945-09-21
•
Granted: 1953-09-01
•
Expires: 1965-09-21
Abstract
No abstract record available.
Inventors
- 👤 John B Rust
- 👤 Spialter Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:02
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE METHOD OF PREPARING HALO ESTERS OF SILICIC ACIDS WHICH COMPRISES REACTING SILICON TETRACHLORIDE WITH AN EPOXIDE CONTAINING THREE CARBON ATOMS.
Claim 2
Independent Claim
21 words
THE METHOD OF PREPARING HALO ESTERS OF SILICIC ACIDS WHICH COMPRISES REACTING SILICON TETRACHLORIDE WITH AN EPOXIDE CONTAINING THREE CARBON ATOMS.
References Cited (Backward Citations)
DE459738C
Cited
US1944274A
Cited
US2242400A
Cited
US2381138A
Cited
US2381137A
Cited
US2381139A
Cited
US2438520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-31 | 1957-03-02 | 1957-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-31 | 1961-03-02 | 1961-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-31 | 1965-03-02 | 1965-09-01 | $7700.00 | Window Closed / Lapsed |