US2643988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-stabilized polychlorotrifluoroethylene resins
Assignee: Union Carbide Corp
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Filing: 1951-10-12
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Granted: 1953-06-30
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Expires: 1971-10-12
Abstract
No abstract record available.
Inventors
- 👤 Andrew T Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:46
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A POLYCHLOROTRIFLUOROETHYLENE RESIN STABILIZED AGAINST COLOR DEVELOPMENT AND DEGRADATION OF MELT-VISCOSITY AT MOLDING TEMPERATURES BY THE PRESENCE INTIMATELY DISPERSED THEREIN OF ABOUT 0.01 TO 2.5 PARTS PER 100 PARTS OF RESIN, BY WEIGTH OF A METAL SALT OF AN OXYACID OF CHLORINE, SAID METAL BEING OF THE FIRST TWO GROUPS OF METALS OF THE PERIODIC CLASSIFICATION.
Claim 2
Dependent Claim
56 words
A POLYCHLOROTRIFLUOROETHYLENE RESIN STABILIZED AGAINST COLOR DEVELOPMENT AND DEGRADATION OF MELT-VISCOSITY AT MOLDING TEMPERATURES BY THE PRESENCE INTIMATELY DISPERSED THEREIN OF ABOUT 0.01 TO 2.5 PARTS PER 100 PARTS OF RESIN, BY WEIGTH OF A METAL SALT OF AN OXYACID OF CHLORINE, SAID METAL BEING OF THE FIRST TWO GROUPS OF METALS OF THE PERIODIC CLASSIFICATION.
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |