US3273528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windsurfer
Assignee: Individual
•
Filing: 1964-07-20
•
Granted: 1966-09-20
•
Expires: 1984-07-20
Abstract
No abstract record available.
Inventors
- 👤 Michael C Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:30
CPC Classifications
B; B63; B63B; B63B32/00; B63B32/50; B63B32/55
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A CRAFT OF THE CATAMARAN TYPE, COMPRISING IN COMBINATION: (A) A MAIN FRAME; (B) TWO SURFBORADS; (C) AND CLAMPING MEANS ON THE FRAME ENGAGEABLE WITH OPPOSITE EDGES OF BOTH SURFBOARDS FOR REMOVABLY ATTACHING THE SURFBOARDS TO THE MAIN FRAME.
Claim 2
Dependent Claim
39 words
A CRAFT OF THE CATAMARAN TYPE, COMPRISING IN COMBINATION: (A) A MAIN FRAME; (B) TWO SURFBORADS; (C) AND CLAMPING MEANS ON THE FRAME ENGAGEABLE WITH OPPOSITE EDGES OF BOTH SURFBOARDS FOR REMOVABLY ATTACHING THE SURFBOARDS TO THE MAIN FRAME.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |