Patent US2675397A successfully refreshed from Google Patents.
US2675397A
Expired / Lapsed
US
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Process of preparing alkyl or aryl tin compounds
Assignee: Primerica Inc
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Filing: 1950-09-23
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Granted: 1954-04-13
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Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Ramsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:45
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE METHOD OF PRODUCING AN ORGANOTIN COMPOUND, WHICH COMPRISES PREPARING A GRINARD REAGENT IN THE PRESENCE OF A SOLVENT ETHER, ADDING AN INERT HYDROCARBON SOLVENT HAVING A BOILING POINT SUBSTANTIALLY HIGHER THAN THAT OF THE SOLVENT ETHER, REMOVING THE SOLVENT ETHER, ADDING TIN TETRACHLORIDE, AND HEATING THE MIXTURE TO AN ELEVATED TEMPERATURE.
Claim 2
Independent Claim
52 words
THE METHOD OF PRODUCING AN ORGANOTIN COMPOUND, WHICH COMPRISES PREPARING A GRINARD REAGENT IN THE PRESENCE OF A SOLVENT ETHER, ADDING AN INERT HYDROCARBON SOLVENT HAVING A BOILING POINT SUBSTANTIALLY HIGHER THAN THAT OF THE SOLVENT ETHER, REMOVING THE SOLVENT ETHER, ADDING TIN TETRACHLORIDE, AND HEATING THE MIXTURE TO AN ELEVATED TEMPERATURE.
References Cited (Backward Citations)
US2066198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |