US2749960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite structures
Assignee: EIDP Inc
•
Filing: 1953-09-18
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Granted: 1956-06-12
•
Expires: 1973-09-18
Abstract
No abstract record available.
Inventors
- 👤 Harold G Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B29D30/56; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158; Y10T428/31855; Y10T428/31909; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A COMPOSITE ELASTIC STRUCTURE COMPRISING A LAYER OF A POLYALKYLENE ETHER GLYCOL-DIISOCYANATE ELASTOMER SAID GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 750, A POLYCHLOROPRENE LAYER, AND A LAYER OF AN ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, BUTADIENESTYRENE COPOLYMERS, BUTADIENE POLYMERS, BUTADIENE-ACRYLONITRILE COPOLYMERS, AND POLYACRYLIC ACID ESTER POLYMERS, THE POLYCHLOROPRENE LAYER BEING IN INTIMATE ADHERENT RELATIONSHIP WITH AND INTERPOSED BETWEEN THE OTHER TWO LAYERS.
Claim 2
Dependent Claim
67 words
A COMPOSITE ELASTIC STRUCTURE COMPRISING A LAYER OF A POLYALKYLENE ETHER GLYCOL-DIISOCYANATE ELASTOMER SAID GLYCOL HAVING A MOLECULAR WEIGHT OF AT LEAST 750, A POLYCHLOROPRENE LAYER, AND A LAYER OF AN ELASTOMER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, BUTADIENESTYRENE COPOLYMERS, BUTADIENE POLYMERS, BUTADIENE-ACRYLONITRILE COPOLYMERS, AND POLYACRYLIC ACID ESTER POLYMERS, THE POLYCHLOROPRENE LAYER BEING IN INTIMATE ADHERENT RELATIONSHIP WITH AND INTERPOSED BETWEEN THE OTHER TWO LAYERS.
References Cited (Backward Citations)
US2501493A
Cited
US2418025A
Cited
US2471905A
Cited
US2621166A
Cited
US2650212A
Cited
US2675855A
Cited
US2692873A
Cited
US2713884A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |