Patent US2820774A successfully refreshed from Google Patents.
US2820774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl chloride resin with lead salt and hindered phenol stabilizers
Assignee: Union Carbide Corp
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Filing: 1954-03-17
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Granted: 1958-01-21
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Expires: 1974-03-17
Abstract
No abstract record available.
Inventors
- 👤 Clayton S Myers
- 👤 Joseph E Wilson
- 👤 Bostwick Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:49
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PLASTIC COMPOSITION STABILIZED AGAINST BOTH CHEMICAL DECOMPOSITION AND THE DEVELOPMENT OF COLOR AND ODOR OR HEATING WHICH COMPRISES A VINYL CHLORIDE RESIN, A LEAD SALT STABILIZER FOR THE VINYL CHLORIDE RESIN, AND AN AUXILIARY STABILIZER IN AN AMOUNT BETWEEN 0.005 TO 0.5% BY WEIGHT OF THE VINYL CHLORIDE RESIN, SAID AUXILIARY STABILIZER BEING SA 2,4,6-TRIALKYL SUBSTITUTED PHENOL IN WHICH THE ALKYL SUBSTITUENTS IN THE 2,6-POSITION ARE TERTIARY BUTYL RADICALS, AND THE ALKYL GROUP IN THE 4-POSITION CONTAINS UP TO FOUR CARBON ATOMS.
Claim 2
Dependent Claim
83 words
A PLASTIC COMPOSITION STABILIZED AGAINST BOTH CHEMICAL DECOMPOSITION AND THE DEVELOPMENT OF COLOR AND ODOR OR HEATING WHICH COMPRISES A VINYL CHLORIDE RESIN, A LEAD SALT STABILIZER FOR THE VINYL CHLORIDE RESIN, AND AN AUXILIARY STABILIZER IN AN AMOUNT BETWEEN 0.005 TO 0.5% BY WEIGHT OF THE VINYL CHLORIDE RESIN, SAID AUXILIARY STABILIZER BEING SA 2,4,6-TRIALKYL SUBSTITUTED PHENOL IN WHICH THE ALKYL SUBSTITUENTS IN THE 2,6-POSITION ARE TERTIARY BUTYL RADICALS, AND THE ALKYL GROUP IN THE 4-POSITION CONTAINS UP TO FOUR CARBON ATOMS.
References Cited (Backward Citations)
US2564646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |