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Patent US3642846A successfully refreshed from Google Patents.
US3642846A
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US
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Organotin bis(monoalkenyl maleates)
Assignee: Tenneco Chemicals Inc
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Filing: 1969-02-05
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Granted: 1972-02-15
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Expires: 1989-02-05
Abstract
Abstract POLYVINYL CHLORIDE RESIN COMPOSITIONS THAT CONTAIN AS STABILIZER AN ORGANOTIN COMPOUND HAVING THE STRUCTURAL FORMULA (R2-)2-SN(-OOC-CH=CH-COO-CH(-R1)-CH=CH-R2)2 WHEREIN EACH R REPRESENTS AN ALKYL GROUP HAVING FROM 4 TO 8 CARBON ATOMS OR A PHENYL GROUP; EACH R1 REPRESENTS HYDROGEN OR AN ALKYL GROUP HAVING FROM 1 TO 4 CARBON ATOMS; AND EACH R2 REPRESENTS METHYL OR PHENYL ARE CHARACTERIZED BY EXCELLENT HEAT STABILITY, RESISTANCE TO DEGRADATION RESULTING FROM EXPOSURE TO ULTRAVIOLET RADIATION, COLOR, AND CLARITY. ILLUSTRATIVE OF THESE ORGANOTIN COMPOUNDS IS SI-N-BUTYLTIN BIX (MONOBUTENYL MALEATE).
Inventors
- 👤 Samuel Hoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:23
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/56; C08K5/57; C07; C07F; C07F7/00; C07F7/22; C07F7/2224
Claims Analysis
Total Claims: 0
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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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |