US3310116A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine propeller
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
•
Filing: 1966-02-16
•
Granted: 1967-03-21
•
Expires: 1986-02-16
Abstract
No abstract record available.
Inventors
- 👤 Saeki Shogo
- 👤 Matsumoto Hiroji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:38
CPC Classifications
B; B63; B63H; B63H1/00; B63H1/02; B63H1/12; B63H1/14; B63H1/28; B63H1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A MARINE PROPELLER COMPRISING A HUB AND HOLLOW BLADES MOUNTED ABOUT THE PERIPHERY OF SAID HUB, SAID HOLLOW BLADES COMPRISING A PAIR OF PLATES CONFORMING IN OUTLINE TO EACH OTHER AND FORMED TO THE DESIRED BLADE FORM ON THE FRONT AND BACK SIDES, SAID PLATES BEING INTERCONNECTED ABOUT THEIR PERIPHERY TO FORM A HOLLOW BLADE STRUCTURE, STIFFENING RODS SPANNING BETWEEN SAID PLATES, AN INLET OPENING IN SAID BLADE, A VENT PORT IN SAID BLADE SPACED FROM SAID INLET OPENING, A CELLULAR STUFFING COMPOSITION FORMED IN PLACE IN SAID HOLLOW BLADE BY INTRODUCTION OF THE INGREDIENTS THEREOF THROUGH SAID INLET OPENING, AND MEANS TO SEAL SAID INLET OPENING AND VENT PORT INCLUDING A SYNTHETIC RESIN FILM COATING SAID BLADE.
Claim 2
Dependent Claim
118 words
A MARINE PROPELLER COMPRISING A HUB AND HOLLOW BLADES MOUNTED ABOUT THE PERIPHERY OF SAID HUB, SAID HOLLOW BLADES COMPRISING A PAIR OF PLATES CONFORMING IN OUTLINE TO EACH OTHER AND FORMED TO THE DESIRED BLADE FORM ON THE FRONT AND BACK SIDES, SAID PLATES BEING INTERCONNECTED ABOUT THEIR PERIPHERY TO FORM A HOLLOW BLADE STRUCTURE, STIFFENING RODS SPANNING BETWEEN SAID PLATES, AN INLET OPENING IN SAID BLADE, A VENT PORT IN SAID BLADE SPACED FROM SAID INLET OPENING, A CELLULAR STUFFING COMPOSITION FORMED IN PLACE IN SAID HOLLOW BLADE BY INTRODUCTION OF THE INGREDIENTS THEREOF THROUGH SAID INLET OPENING, AND MEANS TO SEAL SAID INLET OPENING AND VENT PORT INCLUDING A SYNTHETIC RESIN FILM COATING SAID BLADE.
References Cited (Backward Citations)
GB124253A
Cited
FR603100A
Cited
FR894447A
Cited
GB659344A
Cited
US2767461A
Cited
US3055437A
Cited
US3112797A
Cited
US3133596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |