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Patent US3665024A successfully refreshed from Google Patents.
US3665024A
Expired / Lapsed
US
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Dialkyltin bis(substituted mercaptides)
Assignee: Valtris Specialty Chemicals Ltd
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Filing: 1969-11-18
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Granted: 1972-05-23
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Expires: 1989-11-18
Abstract
Abstract New organotin compounds, suitable for use as stabilizers for vinyl halide resins, are obtained by reacting a dialkyltin oxide, hydroxide, or dihalide with a monoester of a diol or an alkoxy or acyloxy alcohol with a mercapto-acid.
Inventors
- 👤 Vincent Oakes
- 👤 Brian Rodney Iles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:24
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C08K5/58; C07; C07F; C07F7/00; C07F7/22; C07F7/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A compound as claimed in claim 1, wherein R2 is -C2H4- or
Claim 2
Dependent Claim
63 words
A method of preparing a compound as claimed in claim 1 comprising the steps of: a. dissolving R2SnO in acetic anhydride to form the corresponding acetate; b. reacting the acetate with a monoester having the general formula HS(CH2)nCOOR2OR3 in which R, R2, R3 and n have the same meaning as defined in claim 7; and c. removing acetic acid formed during the reaction.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |