US2996409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite cellular structures and process of making same
Assignee: EIDP Inc
•
Filing: 1956-11-30
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Granted: 1961-08-15
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Expires: 1976-11-30
Abstract
No abstract record available.
Inventors
- 👤 Lavely George Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:04
CPC Classifications
C; C08; C08J; C08J9/00; B; B32; B32B; B32B27/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/24996; Y10T428/249981; Y10T428/31504; Y10T428/31971
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
AS A NEW ARTICLE OF MANUFACTURE A COMPOSITE COMPRISING A HYDROPHILIC REGENERATED CELLULOSE SPONGE STRUCTURE HAVING DIRECTLY BONDED TO A SURFACE THEREOF A LAYER OF POLYURETHANE FOAM.
References Cited (Backward Citations)
US2356079A
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GB578404A
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US2468716A
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FR1103628A
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GB748990A
Cited
US2820314A
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US2848840A
Cited
US2880443A
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US2906643A
Cited
US2906642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |