US3734811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated construction of cellular plastic material
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1970-10-29
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Granted: 1973-05-22
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Expires: 1990-10-29
Abstract
Abstract ACCORDING TO THE TEACHINGS OF THE INSTANT INVENTION, A HIGH-STRENGTH CELLULAR PLASTIC INSULATION SYSTEM COMPRISED OF ALTERNATING LAYERS OF CELLULAR PLASTIC AND THIN COLUUMNS OF SOLID PLASTIC IS FORMED BY HEAT SEALING BLOCKS OF THE CELLULAR PLASTIC TOGETHER. THE RESULTINGG PRODUCT, WHILE RETAINING ITS HIGH INSULATION EFFICIENCY, HAS GREATLY IMPROVED COMPRESSIVE STRENGTH AND INCREASED FATIGUE RESISTANCE. D R A W I N G
Inventors
- 👤 A Small
- 👤 P Gorman
- 👤 F Mcgarry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:15
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/20; B29C66/00; B29C66/004; B29C66/0042; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/72; B29C66/727; B29C66/80; B29C66/81; B29C66/812; B29C66/8122; B29C66/83; B29C66/834; B29C66/8341; B29C66/83421; B29C66/83423; B29C67/00; B29C67/20; B32B37/00; B32B37/06; B32B37/08; B32B37/10; B32B38/00; B32B38/0004; B32B5/18; B32B7/00; B32B7/04; B32B7/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; F; F17; F17C; F17C13/00; F17C13/001; B29C66/71; B29L; B29L2009/00; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2266/0235; B32B2266/025; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/31; B32B2439/00; B32B2439/40; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/1062; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/24174; Y10T428/249921; Y10T428/249953; Y10T428/249981
Claims Analysis
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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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |