US2951819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer compositions comprising an alkali metal borohydride and stearic acid and preparation of cellular rubber-like articles therefrom
Assignee: Metal Hydrides Inc
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Filing: 1958-03-06
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Granted: 1960-09-06
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Expires: 1978-03-06
Abstract
No abstract record available.
Inventors
- 👤 Robert C Wade
- 👤 Phillip L Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
THE METHOD OF MAKING CELLULAR ARTICLES WHICH COMPRISES MIXING A SOLID UNCURED RUBBER-LIKE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CRUDE NATURAL RUBBER, A STYRENE-BUTADIENE COPOLYMER, POLYCHLOROPRENE, A BUTYL RUBBER PRODUCED BY POLYMERIZING ISOBUTENE WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF BUTADIENE AND ISOPRENE IN THE PROPORTION OF ABOUT 98% OF ISOBUTENE AND ABOUT 2% OF SAID SELECTED SUBSTANCE, AN ACRYLONITRILEBUTADIENE COPOLYMER, SILICONE RUBBER AND BLENDS THEREOF WITH RUBBER COMPOUNDING COMPONENTS COMPRISING A VULCANIZING AGENT, STEARIC ACID AND A BOROHYDRIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM BOROHYDRIDE AND POTASSIUM BOROHYDRIDE, SAID BOROHYDRIDE AND STEARIC ACID BEING PRESENT IN THE MIXTURE IN AMOUNTS BETWEEN ABOUT 0.2 TO 0.5 PART AND ABOUT 2 TO 4 PARTS BY WEIGHT RESPECTIVELY, AND THEN HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 120*C. AND 180*C. UNTIL THE MIXTURE IS SUBSTANTIALLY COMPLETELY CURED.
Claim 2
Independent Claim
140 words
THE METHOD OF MAKING CELLULAR ARTICLES WHICH COMPRISES MIXING A SOLID UNCURED RUBBER-LIKE MATERIAL SELECTED FROM THE GROUP CONSISTING OF CRUDE NATURAL RUBBER, A STYRENE-BUTADIENE COPOLYMER, POLYCHLOROPRENE, A BUTYL RUBBER PRODUCED BY POLYMERIZING ISOBUTENE WITH A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF BUTADIENE AND ISOPRENE IN THE PROPORTION OF ABOUT 98% OF ISOBUTENE AND ABOUT 2% OF SAID SELECTED SUBSTANCE, AN ACRYLONITRILEBUTADIENE COPOLYMER, SILICONE RUBBER AND BLENDS THEREOF WITH RUBBER COMPOUNDING COMPONENTS COMPRISING A VULCANIZING AGENT, STEARIC ACID AND A BOROHYDRIDE SELECTED FROM THE GROUP CONSISTING OF SODIUM BOROHYDRIDE AND POTASSIUM BOROHYDRIDE, SAID BOROHYDRIDE AND STEARIC ACID BEING PRESENT IN THE MIXTURE IN AMOUNTS BETWEEN ABOUT 0.2 TO 0.5 PART AND ABOUT 2 TO 4 PARTS BY WEIGHT RESPECTIVELY, AND THEN HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 120*C. AND 180*C. UNTIL THE MIXTURE IS SUBSTANTIALLY COMPLETELY CURED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |