US3244236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propellers
Assignee: Individual
•
Filing: 1965-04-30
•
Granted: 1966-04-05
•
Expires: 1985-04-30
Abstract
No abstract record available.
Inventors
- 👤 Langham John Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:21
CPC Classifications
F; F16; F16B; F16B4/00; F16B4/006; B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/20; B63H23/00; B63H23/32; B63H23/34; B63J; B63J2/00; B63J2/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49815; Y10T29/49822; Y10T29/49824; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T403/00; Y10T403/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A MARINE PROPELLER COMPRISING, A PROPELLER BOSS, AN ELECTRIC HEATING ELEMENT AND REFRACTORY MATERIAL ENCASING THE HEATING ELEMENT WHICH IS ENBEDDED IN THE PROPELLER BOSS IN THE REGION OF SHAFT RECEIVING BORE OF THE PROPELLER SO THAT BY PASSING AN ELECTRIC CURRENT THROUGH THE ELECTRIC HEATING ELEMENT THE SAID REGION OF THE BOSS IS CAUSED TO EXPAND IN A UNIFORM AND CONTROLLED MANNER.
Claim 2
Dependent Claim
63 words
A MARINE PROPELLER COMPRISING, A PROPELLER BOSS, AN ELECTRIC HEATING ELEMENT AND REFRACTORY MATERIAL ENCASING THE HEATING ELEMENT WHICH IS ENBEDDED IN THE PROPELLER BOSS IN THE REGION OF SHAFT RECEIVING BORE OF THE PROPELLER SO THAT BY PASSING AN ELECTRIC CURRENT THROUGH THE ELECTRIC HEATING ELEMENT THE SAID REGION OF THE BOSS IS CAUSED TO EXPAND IN A UNIFORM AND CONTROLLED MANNER.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |