US3657183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of poly(vinyl chloride)
Assignee: Wyeth Holdings LLC
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Filing: 1969-04-24
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Granted: 1972-04-18
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Expires: 1989-04-24
Abstract
Abstract THE STABILIZATION OF RIGID POLY(VINYL CHLORIDE) BY INCORPORATION THEREIN OF A STABILIZER COMPRISING (A) 0.1 TO 10.0% BASED ON THE WEIGHT OF THE RIGID POLY(VINYL CHLORIDE) OF AN ALKANOLAMINE OR A LOWER ALKYLENE OXIDE ADDUCT THEREOF AND (B) 0.1 TO 3.0% BASED ON THE WEIGHT OF THE RIGID POLY(VINYL CHLORIDE) OF AN ULTRAVIOLET LIGHT ABSORBER. IN THE PREFERRED EMBODIMENTS, A HEAT STABILIZER IS ALSO USED.
Inventors
- 👤 Joseph Anthony Stretanski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:38
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/34; C08K5/35
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |