US3738903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetic sealing of apertured articles
Assignee: Homasote Co
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Filing: 1971-05-24
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Granted: 1973-06-12
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Expires: 1991-05-24
Abstract
Abstract An apertured article of manufacture, for example an end suspension panel for a reel on which a web of material may be wound, is hermetically sealed in a plastic that the foaming of the core resin occurs simultaneously with the hardening of the resin of the facing layers so that the assembly is integrated effectively, giving rise to no faulty joints or deleterious stresses, and thereby imparting maximum strength characteristics to the panels.
Inventors
- 👤 C Berwick
- 👤 C Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:10
CPC Classifications
B; B65; B65B; B65B25/00; B65B25/24; B65D; B65D75/00; B65D75/04; B65D75/20; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/1056; Y10T156/1057; Y10T156/108; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24273; Y10T428/24322
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |