Patent US3740283A successfully refreshed from Google Patents.
US3740283A
Expired / Lapsed
US
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Method of making a composite product of strengthened water-blown, flexible polyurethane foam
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1970-07-31
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Granted: 1973-06-19
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Expires: 1990-07-31
Abstract
Abstract IN THE FIELD OF FLEXIBLE FOAMS, THE ABILITY OF THE FOAM TO SUPPORT A GIVEN LOAD (TERMED "SAC FACTOR" IN THE FOAM ART) IS GENERALLY DIRECTLY PROPORTIONAL TO THE FOAM''S DENSITY. IN CERTAIN APPLICATIONS SUCH AS IN RUG UNDERLAY THE SAC FACTOR REQUIREMENT IS SET VERY HIGH AND IS ACHIEVED BY DENSIFYING AN INEXPENSIVE RUBBER FOAM WITH FILLERS. THIS INVENTION IS A METHOD OF RAISING THE SAC FACTOR AND LOAD CARRYING CAPACITY OF WATER-BLOWN FLEXIBLE POLYURETHANE FOAM BY COMPRESSION AND HEAT TREATMENT THEREBY ALLOWING IT TO BECOME COMPPETITIVE WITH CONVENTIONAL LOADED RUBBER FOAM.
Inventors
- 👤 Maxey E Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:05
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; C; C08; C08J; C08J9/00; C08J9/36; B32B37/00; B32B37/06; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/0269; B32B2262/0276; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2309/00; B32B2309/02; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |