Patent US2643263A successfully refreshed from Google Patents.
US2643263A
Expired / Lapsed
US
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Higher secondary-alkyl orthosilicates
Assignee: California Research LLC
•
Filing: 1950-09-22
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Granted: 1953-06-23
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Expires: 1970-09-22
Abstract
No abstract record available.
Inventors
- 👤 Morgan Clarence Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:25
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04; C10; C10M; C10M1/00; C10M1/08; C10M2227/00; C10M2227/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
AS NEW CHEMICAL COMPOUNDS, ORTHOSILICATES CONTAINING SECONDARY BRANCHED CHAIN ALKYL RADICALS HAVING FROM 6 TO 10 CARBON ATOMS IN THE MOLECULE.
Claim 2
Dependent Claim
21 words
AS NEW CHEMICAL COMPOUNDS, ORTHOSILICATES CONTAINING SECONDARY BRANCHED CHAIN ALKYL RADICALS HAVING FROM 6 TO 10 CARBON ATOMS IN THE MOLECULE.
References Cited (Backward Citations)
US2477779A
Cited
US2490691A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |