US3248411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the conversion of highly alkylated tin compounds into lower alkylated tin halides
Assignee: Studiengesellschaft Kohle gGmbH
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Filing: 1962-03-23
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Granted: 1966-04-26
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Expires: 1982-03-23
Abstract
No abstract record available.
Inventors
- 👤 Neumann Wilhelm Paul
- 👤 Burkhardt Gottfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:10
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/22; C07F7/2208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE PRODUCTION OF MIXTURES OF ALKYLATED TIN HALIDES OF THE FORMULA R2SNX2 AND RSNX3, WHEREIN R IS ALKYL AND X IS HALOGEN, BY CONVERSION OF A MEMBER OF THE GROUP OF ALKYLATED TIN COMPOUNDS OF THE FORMULA R4SN AND R3SNX, AND R AND X BEING AS JUST DEFINED, WHICH COMPRISES REACTING SAID GROUP MEMBER WITH A TIN TETRAHALIDE USING TWO MOLS OF SAID TIN TETRAHALIDE FOR EACH MOL OF TIN TETRAALKYL AND ONE MOL OF TIN TETRAHALIDE FOR EACH MOL OF TRIALKYL TIN HALIDE PRESENT, AND RECOVERYING THE ALKYLATED TIN HALIDES THEREBY FORMED.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE PRODUCTION OF MIXTURES OF ALKYLATED TIN HALIDES OF THE FORMULA R2SNX2 AND RSNX3, WHEREIN R IS ALKYL AND X IS HALOGEN, BY CONVERSION OF A MEMBER OF THE GROUP OF ALKYLATED TIN COMPOUNDS OF THE FORMULA R4SN AND R3SNX, AND R AND X BEING AS JUST DEFINED, WHICH COMPRISES REACTING SAID GROUP MEMBER WITH A TIN TETRAHALIDE USING TWO MOLS OF SAID TIN TETRAHALIDE FOR EACH MOL OF TIN TETRAALKYL AND ONE MOL OF TIN TETRAHALIDE FOR EACH MOL OF TRIALKYL TIN HALIDE PRESENT, AND RECOVERYING THE ALKYLATED TIN HALIDES THEREBY FORMED.
References Cited (Backward Citations)
GB739883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |