Patent US1719273A successfully refreshed from Google Patents.
Patent US3914186A successfully refreshed from Google Patents.
US3914186A
Expired / Lapsed
US
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Sponge rubber rug underlay having improved heat age resistance
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1973-04-16
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Granted: 1975-10-21
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Expires: 1993-04-16
Abstract
Abstract A sponge rubber rug underlay compound which is capable of withstanding a temperature of about 275*F. for at least about 24 hours without appreciable degradation, or loss of resiliency. The compound comprises about 100 parts of a rubber which may be subject to oxidative degradation, between about 200 and about 250 parts of calcium carbonate, from about 0.5 to about 3.0 parts of an antioxidant and from about 1.5 to about 3.0 parts of an alkali metal phosphate.
Inventors
- 👤 Richard E Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:46
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/32; C08K3/18; C08K3/24; C08K3/26; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A CURED FLEXIBLE SPONGE RUBER RUG UNDERLAY COMPOSITION, WHICH IS CAPABLE OF WITHSTANDING A TEMPERATURE O ABOUT 275*F. FOR AT LEAST ABOUT 24 HOURS WITHOUT APPRECIABLE DEGRADATION OR LOSS OF RESILIENCY, COMPRISING: A. ABOUT 100 PARTS BY WEIGHT OF A RUBBER WHICH MAY BE SUBJECT TO OXIDATIVE DEGRADATION AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND A RUBBERY COPLYMER CONSISTING OF BUTADIENE AND STYRENE, B. FROM ABOUT 150 AND TO 300 PARTS BY WEIGHT OF CALCIUM CARBONATE, C. FROM ABOUT 0.5 TO 3.0 PARTS BY WEIGHT OF AN ANTIOXIDANT COMPRISING A LOW TEMPERATURE REACTION PRODUCT OF DIPHENYL AMINE AND ACETONE, AND D. FROM ABOUT 1.0 TO 3.0 PARTS BY WEIGHT OF TRISODIUM PHOPHATE.
Claim 2
Dependent Claim
117 words
A CURED FLEXIBLE SPONGE RUBER RUG UNDERLAY COMPOSITION, WHICH IS CAPABLE OF WITHSTANDING A TEMPERATURE O ABOUT 275*F. FOR AT LEAST ABOUT 24 HOURS WITHOUT APPRECIABLE DEGRADATION OR LOSS OF RESILIENCY, COMPRISING: A. ABOUT 100 PARTS BY WEIGHT OF A RUBBER WHICH MAY BE SUBJECT TO OXIDATIVE DEGRADATION AND WHICH IS SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND A RUBBERY COPLYMER CONSISTING OF BUTADIENE AND STYRENE, B. FROM ABOUT 150 AND TO 300 PARTS BY WEIGHT OF CALCIUM CARBONATE, C. FROM ABOUT 0.5 TO 3.0 PARTS BY WEIGHT OF AN ANTIOXIDANT COMPRISING A LOW TEMPERATURE REACTION PRODUCT OF DIPHENYL AMINE AND ACETONE, AND D. FROM ABOUT 1.0 TO 3.0 PARTS BY WEIGHT OF TRISODIUM PHOPHATE.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the rubber is a styrene-butadiene rubber.
Claim 4
Dependent Claim
41 words
The composition of claim 1 where the calcium carbonate is used in an amount of from about 200 to 250 parts by weight and the trisodium phosphate is used in an amount of from about 1.5 to 3 parts by weight.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |