Patent US3180848A successfully refreshed from Google Patents.
US3180848A
Expired / Lapsed
US
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Stabilization of vinyl halide resin compositions containing iron-bearing asbestos
Assignee: Nopco Chemical Co
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Filing: 1959-12-23
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Granted: 1965-04-27
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Expires: 1979-12-23
Abstract
No abstract record available.
Inventors
- 👤 Henry R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:07
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/1539; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL HALIDE RESIN, FROM ABOUT 25 TO 300 PARTS BY WEIGHT OF ASBESTOS PER 100 PARTS BY WEIGHT OF SAID RESIN, SAID ASBESTOS BEING AN IRON CONTAINING ASBESTOS, AND AS A STABILIZER FOR SAID COMPOSITION A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, DIMETHYL BUTENYL PHTHALIC ANHYDRIDE, TRIMELLITIC ANHYDRIDE, ENDO-CIS-BICYCLO (2.2.1) HEPT-5-ENE-2,3 DICARBOXYLIC ANHYDRIDE, TETRAHYDROPHTHALIC ANHYDRIDE, HEXAHYDROPHTHALIC ANHYDRIDE, PYROMELLITIC ANHYDRIDE, TRIMELLITIC DOUBLE ANHYDRIDE AND MIXTURES THEREOF.
Claim 2
Dependent Claim
74 words
A COMPOSITION OF MATTER COMPRISING A POLYVINYL HALIDE RESIN, FROM ABOUT 25 TO 300 PARTS BY WEIGHT OF ASBESTOS PER 100 PARTS BY WEIGHT OF SAID RESIN, SAID ASBESTOS BEING AN IRON CONTAINING ASBESTOS, AND AS A STABILIZER FOR SAID COMPOSITION A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHTHALIC ANHYDRIDE, DIMETHYL BUTENYL PHTHALIC ANHYDRIDE, TRIMELLITIC ANHYDRIDE, ENDO-CIS-BICYCLO (2.2.1) HEPT-5-ENE-2,3 DICARBOXYLIC ANHYDRIDE, TETRAHYDROPHTHALIC ANHYDRIDE, HEXAHYDROPHTHALIC ANHYDRIDE, PYROMELLITIC ANHYDRIDE, TRIMELLITIC DOUBLE ANHYDRIDE AND MIXTURES THEREOF.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |