Patent US3200421A successfully refreshed from Google Patents.
US3200421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aquaplane
Assignee: Individual
•
Filing: 1963-06-20
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Granted: 1965-08-17
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Expires: 1983-06-20
Abstract
No abstract record available.
Inventors
- 👤 James R Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:38
CPC Classifications
B; B63; B63B; B63B34/00; B63B34/50; B63B34/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN AQUAPLANE COMPRISING (A) A BODY HAVING A SUBSTANTIALLY FLAT UNDER SURFACE, (B) A PAIR OF LATERALLY SPACED STEP PLANES FASTENED TO THE UNDER SURFACE OF THE FORWARD PORTION OF THE BODY, ONE ON EACH SIDE, (C) EACH OF THE STEP PLANES COMPRISING A DOWNWARDLY AND REARWARDLY INCLINED PLANE MEMBER THE TRANSVERSE AXIS OF WHICH IS SUBSTANTIALLY PARALLEL TO THE TRANSVERSE AXIS OF THE BODY, AND A SUBSTANTIALLY UPRIGHT SUPPORT MEMBER BRACING THE REARWARD END OF THE PLANE MEMBER, (D) EACH OF THE STEP PLANES BEING OPEN AT ITS SIDES TO PERMIT FREE LATERAL PASSAGE OF WATER BETWEEN THE PLANES AND THE BODY,
Claim 2
Dependent Claim
103 words
AN AQUAPLANE COMPRISING (A) A BODY HAVING A SUBSTANTIALLY FLAT UNDER SURFACE, (B) A PAIR OF LATERALLY SPACED STEP PLANES FASTENED TO THE UNDER SURFACE OF THE FORWARD PORTION OF THE BODY, ONE ON EACH SIDE, (C) EACH OF THE STEP PLANES COMPRISING A DOWNWARDLY AND REARWARDLY INCLINED PLANE MEMBER THE TRANSVERSE AXIS OF WHICH IS SUBSTANTIALLY PARALLEL TO THE TRANSVERSE AXIS OF THE BODY, AND A SUBSTANTIALLY UPRIGHT SUPPORT MEMBER BRACING THE REARWARD END OF THE PLANE MEMBER, (D) EACH OF THE STEP PLANES BEING OPEN AT ITS SIDES TO PERMIT FREE LATERAL PASSAGE OF WATER BETWEEN THE PLANES AND THE BODY,
References Cited (Backward Citations)
US1736156A
Cited
US2930338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |