Patent US2964503A successfully refreshed from Google Patents.
US2964503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide compositions and cure
Assignee: Products Res Co
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Filing: 1957-03-29
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Granted: 1960-12-13
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Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 Gordon D Carpenter
- 👤 Gregory George
- 👤 Sarkis H Kalfayan
- 👤 Irvin P Seegman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:20
CPC Classifications
C; C08; C08L; C08L81/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A METHOD OF PRODUCING A HIGH HEAT AND HYDROCARBON RESISTANT TYPE OF CURED ELASTOMER, SAID ELASTOMER BEING PARTICULARLY CHARACTERIZED BY ENHANCED ELECTRICAL PROPERTIES A LOW WATER SENSITIVITY AT ELEVATED TEMPERATURES, AND RESISTANCE TO THERMAL EXTRUSION, COMPRISING CONTROLLING THE RATE OF CURE AND MODIFYING THE CHARACTERISTICS OF THE CURED ELASTOMER BY INCORPORATING INTO A COMPENSATION COMPOSED ESSENTIALLY OF POLYALKYLENE POLYSULFIDE LIQUID POLYMERS AND A CURING COMPONENT COMPRISING A SOLUBLE SALT OF CHROMIC ACID ADAPTED TO LIBERATE ANIONS OF CHROMIUM WHEN IN SOLUTION, BETWEEN ABOUT 2 AND 50 PARTS OF A NORMALLY LIQUID, SOLUBILIZING AND MODIFYING AGENT FROM THE GROUP CONSISTING OF AMIDES, SULFOXIDES, SULFONES, SULFONAMIDES, PHOSPHORAMIDES, ESTERS OF PHOSPHORIC ACID, ESTERS OF BORIC ACID, AND ESTERS OF MONOBASIC AND POLYBASIC ORGANIC ACIDS PER EACH ONE HUNDRED PARTS OF POLYALKYLENE POLYSULFIDE POLYMERS, SAID AGENT HAVING A MELTING POINT BELOW ABOUT 20* C., A BOILING POINT ABOUT 125* C. BEING AT LEAST A PARTIAL SOLVENT FOR SAID CURING COMPONENT AND BEING STABLE TO OXIDATION IN THE PRESENCE OF SAID COMPONENT.
Claim 2
Independent Claim
167 words
A METHOD OF PRODUCING A HIGH HEAT AND HYDROCARBON RESISTANT TYPE OF CURED ELASTOMER, SAID ELASTOMER BEING PARTICULARLY CHARACTERIZED BY ENHANCED ELECTRICAL PROPERTIES A LOW WATER SENSITIVITY AT ELEVATED TEMPERATURES, AND RESISTANCE TO THERMAL EXTRUSION, COMPRISING CONTROLLING THE RATE OF CURE AND MODIFYING THE CHARACTERISTICS OF THE CURED ELASTOMER BY INCORPORATING INTO A COMPENSATION COMPOSED ESSENTIALLY OF POLYALKYLENE POLYSULFIDE LIQUID POLYMERS AND A CURING COMPONENT COMPRISING A SOLUBLE SALT OF CHROMIC ACID ADAPTED TO LIBERATE ANIONS OF CHROMIUM WHEN IN SOLUTION, BETWEEN ABOUT 2 AND 50 PARTS OF A NORMALLY LIQUID, SOLUBILIZING AND MODIFYING AGENT FROM THE GROUP CONSISTING OF AMIDES, SULFOXIDES, SULFONES, SULFONAMIDES, PHOSPHORAMIDES, ESTERS OF PHOSPHORIC ACID, ESTERS OF BORIC ACID, AND ESTERS OF MONOBASIC AND POLYBASIC ORGANIC ACIDS PER EACH ONE HUNDRED PARTS OF POLYALKYLENE POLYSULFIDE POLYMERS, SAID AGENT HAVING A MELTING POINT BELOW ABOUT 20* C., A BOILING POINT ABOUT 125* C. BEING AT LEAST A PARTIAL SOLVENT FOR SAID CURING COMPONENT AND BEING STABLE TO OXIDATION IN THE PRESENCE OF SAID COMPONENT.
References Cited (Backward Citations)
US2787608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |