US2660194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expanded cellular plastic flotation body
Assignee: Uniroyal Inc
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Filing: 1952-08-09
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Granted: 1953-11-24
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Expires: 1972-08-09
Abstract
No abstract record available.
Inventors
- 👤 John J Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:28
CPC Classifications
B; B63; B63C; B63C9/00; B63B; B63B2231/00; B63B2231/40; B63B2231/50; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
A FLOTATION BLOCK COMPRISING IN COMBINATION A CORE OF EXPANDED CELLULAR POLYSTYRENE RESIN AND A RELATIVELY THIN SHELL OF A TOUGH EXPANDED CELLULAR MATERIAL BONDED TO THE CORE, SAID SHELL BEING FORMED OF A MIXTURE OF 50 TO 80 PER CENT OF A THERMOPLASTIC RESIN AND CORRESPONDINGLY FROM 50 TO 20 PER CENT OF A RUBBERY MATERIAL COMPATIBLE WITH SAID RESIN.
References Cited (Backward Citations)
US1466671A
Cited
US1930441A
Cited
US2526311A
Cited
US2447056A
Cited
US2540831A
Cited
US2439202A
Cited
US2448154A
Cited
US2532242A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |