Patent US2862944A successfully refreshed from Google Patents.
US2862944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of high purity alkyltin compounds
Assignee: Primerica Inc
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Filing: 1955-12-07
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Granted: 1958-12-02
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Expires: 1975-12-07
Abstract
No abstract record available.
Inventors
- 👤 Carl R Gloskey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:19
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE PROCESS WHICH COMPRISES REACTING AN IMPURE MIXTURE COMPRISING A TRIALKYLTIN CHLORIDE AND TETRAALKYLTIN WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF AN ALKALI METAL HYDROXIDE DISSOLVED IN WATER, TO FORM AN AQUEOUS PHASE AND AN ORGANIC PHASE, SEPARATING THE AQUEOUS PHASE FROM THE ORGANIC PHASE, AND DISTILLING THE ORGANIC PHASE TO SEPARATE TRILKYLTIN OXIDE FROM TETRAALKYLTIN.
Claim 2
Dependent Claim
56 words
THE PROCESS WHICH COMPRISES REACTING AN IMPURE MIXTURE COMPRISING A TRIALKYLTIN CHLORIDE AND TETRAALKYLTIN WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF AN ALKALI METAL HYDROXIDE DISSOLVED IN WATER, TO FORM AN AQUEOUS PHASE AND AN ORGANIC PHASE, SEPARATING THE AQUEOUS PHASE FROM THE ORGANIC PHASE, AND DISTILLING THE ORGANIC PHASE TO SEPARATE TRILKYLTIN OXIDE FROM TETRAALKYLTIN.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |