Patent US4691128A successfully refreshed from Google Patents.
Patent US3306577A successfully refreshed from Google Patents.
US3306577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine device
Assignee: Individual
•
Filing: 1965-08-19
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Granted: 1967-02-28
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Expires: 1985-08-19
Abstract
No abstract record available.
Inventors
- 👤 Sagara Hideo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:34
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A TURBINE COMPRISING A ROTOR HAVING A RECESS DEFINED AROUND THE PERIPHERY THEREOF, A PLURALITY OF TURBINE BLADES SECURED TO THE PERIPHERY OF SAID ROTOR, EACH OF SAID BLADES INCLUDING A ROOT PORTION ENGAGED WITHIN THE RECESS OF SAID ROTOR, AND SHROUD MEANS INTERCONNECTING A PLURALITY OF SAID BLADES INTO A PLURALITY OF GROUPS OF BLADES EXTENDING AROUND THE PERIPHERY OF SAID ROTOR, ADJACENT GROUPS BEING OF A DIFFERENT NUMBER OF BLADES.
Claim 2
Dependent Claim
72 words
A TURBINE COMPRISING A ROTOR HAVING A RECESS DEFINED AROUND THE PERIPHERY THEREOF, A PLURALITY OF TURBINE BLADES SECURED TO THE PERIPHERY OF SAID ROTOR, EACH OF SAID BLADES INCLUDING A ROOT PORTION ENGAGED WITHIN THE RECESS OF SAID ROTOR, AND SHROUD MEANS INTERCONNECTING A PLURALITY OF SAID BLADES INTO A PLURALITY OF GROUPS OF BLADES EXTENDING AROUND THE PERIPHERY OF SAID ROTOR, ADJACENT GROUPS BEING OF A DIFFERENT NUMBER OF BLADES.
References Cited (Backward Citations)
US1959220A
Cited
US2265592A
Cited
US2308426A
Cited
US2326145A
Cited
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Cited
US2414278A
Cited
US2431249A
Cited
FR1281536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |