Patent US3676276A successfully refreshed from Google Patents.
US3676276A
Expired / Lapsed
US
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Endless inflatable device
Assignee: HIRSHEN VAN DER RYN
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Filing: 1969-12-11
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Granted: 1972-07-11
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Expires: 1989-12-11
Abstract
Abstract A device comprised of a plurality of inflatable cells arranged in end-to-end relationship to form an endless body with each cell having inflation means to permit the same to be inflated independently of the other cells. The device can be made from an initially flat sheet of a suitable material capable of being heat sealed, such as vinyl or the like.
Inventors
- 👤 Sanford Hirshen
- 👤 Sim Van Der Ryn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:52
CPC Classifications
A; A63; A63G; A63G31/00; A63B; A63B9/00; A63B2208/00; A63B2208/12; A63B2225/00; A63B2225/62
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |