US3275082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propellers for water craft
Assignee: Individual
•
Filing: 1965-08-19
•
Granted: 1966-09-27
•
Expires: 1985-08-19
Abstract
No abstract record available.
Inventors
- 👤 Robert E Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:27
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/16; B63H3/00; B63H3/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROPELLER OF THE CLASS DESCRIBED COMPRISING A HUB, AT LEAST ONE PROPELLER BLADE EXTENDING FROM THE HUB AND FORMED INTEGRALLY THEREWITH, SAID BLADE BEING OF A MATERIAL HAVING LIMITED FLEXIBILITY AND BEING RESILIENT, A FIN ATTACHED TO THE LOW PRESSURE SIDE OF THE BLADE AND ARRANGED TO CAUSE AN INCREASE IN THE PITCH OF THE BLADE WITH AN INCREASE IN R.P.M.
Claim 2
Dependent Claim
62 words
A PROPELLER OF THE CLASS DESCRIBED COMPRISING A HUB, AT LEAST ONE PROPELLER BLADE EXTENDING FROM THE HUB AND FORMED INTEGRALLY THEREWITH, SAID BLADE BEING OF A MATERIAL HAVING LIMITED FLEXIBILITY AND BEING RESILIENT, A FIN ATTACHED TO THE LOW PRESSURE SIDE OF THE BLADE AND ARRANGED TO CAUSE AN INCREASE IN THE PITCH OF THE BLADE WITH AN INCREASE IN R.P.M.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |