Patent US2973335A successfully refreshed from Google Patents.
US2973335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vulcanizing silicone rubber in presence of antioxidants
Assignee: Connecticut Hard Rubber Co
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Filing: 1956-09-26
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Granted: 1961-02-28
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Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Keistutis J Stasiunas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:15
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF A RUBBERY, POLYMERIC DIMETHYLSILOXANE HAVING DISPERSED THEREIN AN ANTIOXIDANT AND AN ORGANIC PULVERULENT SOLID CONSISTING ESSENTIALLY OF SUBSTRATE PARTICLES OF ORGANIC SILICEOUS MATERIAL IN A SUPERCOLLOIDAL STATE OF SUBDIVISION HAVING CHEMICALLY BOUND THERETO PER 100 SQUARE MILLIMICRONS OF SUBSTRATE SURFACE AT LEAST 100 -OR GROUPS, WHEREIN R IS A HYDROCARBON RADICAL CONTAINING 2 TO 18 CARBON ATOMS AND THE CARBON ATOM ATTACHED TO OXYGEN IS ALSO ATTACHED TO AT LEAST ONE HYDROGEN THE SUBSTRATE PARTICLES HAVING AN AVERAGE SPECIFIC AREA OF FROM 25 TO 900 SQUARE METERS/GRAM.
Claim 2
Dependent Claim
95 words
A COMPOSITION COMPRISING 100 PARTS BY WEIGHT OF A RUBBERY, POLYMERIC DIMETHYLSILOXANE HAVING DISPERSED THEREIN AN ANTIOXIDANT AND AN ORGANIC PULVERULENT SOLID CONSISTING ESSENTIALLY OF SUBSTRATE PARTICLES OF ORGANIC SILICEOUS MATERIAL IN A SUPERCOLLOIDAL STATE OF SUBDIVISION HAVING CHEMICALLY BOUND THERETO PER 100 SQUARE MILLIMICRONS OF SUBSTRATE SURFACE AT LEAST 100 -OR GROUPS, WHEREIN R IS A HYDROCARBON RADICAL CONTAINING 2 TO 18 CARBON ATOMS AND THE CARBON ATOM ATTACHED TO OXYGEN IS ALSO ATTACHED TO AT LEAST ONE HYDROGEN THE SUBSTRATE PARTICLES HAVING AN AVERAGE SPECIFIC AREA OF FROM 25 TO 900 SQUARE METERS/GRAM.
References Cited (Backward Citations)
US2666041A
Cited
US2777827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |