US3369262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation cushion
Assignee: McDonnell Douglas Corp
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Filing: 1966-09-27
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Granted: 1968-02-20
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Expires: 1986-09-27
Abstract
No abstract record available.
Inventors
- 👤 Ronald I Judd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:03
CPC Classifications
B; B64; B64D; B64D11/00; B64D11/06; B64D11/0647; B63; B63C; B63C9/00; B63C9/28; B63C9/30; B64C; B64C35/00; B64D11/0627; B64D11/0629; B64D11/0649
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A FLOTATION CUSHION COMPRISING: A TOP PORTION OF OPEN-CELL CELLULAR FOAM MATERIAL; SAID TOP PORTION HAVING A WEDGE OF SIMILAR MATERIAL EXTENDING ALONG THE REAR PORTION OF THE LOWER SURFACE THEREOF; AND A BASE OF CLOSED-CELL CELLULAR MATERIAL HAVING A SPECIFIC GRAVITY LESS THAN THAT OF WATER; SAID BASE HAVING A RIGID FRONT HALF HAVING A THICKNESS GREATER THAN ITS REAR HALF, THE REAR HALF BEING CURVED TO FIT AGAINST SAID WEDGE.
Claim 2
Dependent Claim
72 words
A FLOTATION CUSHION COMPRISING: A TOP PORTION OF OPEN-CELL CELLULAR FOAM MATERIAL; SAID TOP PORTION HAVING A WEDGE OF SIMILAR MATERIAL EXTENDING ALONG THE REAR PORTION OF THE LOWER SURFACE THEREOF; AND A BASE OF CLOSED-CELL CELLULAR MATERIAL HAVING A SPECIFIC GRAVITY LESS THAN THAT OF WATER; SAID BASE HAVING A RIGID FRONT HALF HAVING A THICKNESS GREATER THAN ITS REAR HALF, THE REAR HALF BEING CURVED TO FIT AGAINST SAID WEDGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |