Patent US2507422A successfully refreshed from Google Patents.
US2507422A
Expired / Lapsed
US
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Oxidative polymerization of silicic acid esters
Assignee: Ellis Foster Co
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Filing: 1945-05-29
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Granted: 1950-05-09
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Expires: 1965-05-29
Abstract
No abstract record available.
Inventors
- 👤 John B Rust
- 👤 Charles A Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:12
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
THE METHOD OF PREPARING ORGANO SILICON DERIVATIVES WHICH COMPRISES SUBJECTING AN ESTER OF A SILICIC ACID SELECTED FROM THE GROUP CONSISTING OF THE ESTERS OF ORTHSILICIC ACID AND THE ORTHO ESTERS OF SILICOFORMIC ACID, THE GROUPING FORMING THE ESTER WITH THE ACID RADICAL BEING MONOHYDROXY TO THE ACTION OF SUBSTANTIALLY DRY OXYGEN BLOWN THERETHROUGH AT A TEMPERATURE OF ABOVE ABOUT 100*C. WHILE MAINTAINED IN THE LIQUID STATE UNTIL A POLYMERIC DERIVATIVE RETAINING ORGANIC GROUPS FROM THE ESTER IS OBTAINED AND DISCONTINUING THE REACTION AT THAT STAGE.
References Cited (Backward Citations)
US1809755A
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US2268589A
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DE707393C
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US2114866A
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US2329632A
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US2396692A
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US2394642A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |