Patent US3186172A successfully refreshed from Google Patents.
US3186172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable ratio fluid drive
Assignee: Individual
•
Filing: 1963-09-05
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Granted: 1965-06-01
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 James W Angell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:07
CPC Classifications
F; F16; F16D; F16D33/00; F16D33/02; F16D33/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
A FLUID DRIVE APPARATUS COMPRISING A HOUSING CONTAINING AN IMPELLING FLUID, A FLUID IMPELLING ROTOR WITHIN SAID HOUSING FOR CIRCULATING THE FLUID, A ROTOR DRIVEN BY SAID IMPELLING FLUID, A PLURALITY OF VARIABLE PITCH BLADES CARRIED BY ONE OF SAID ROTORS, MEANS URGING THE VARIABLE PITCH BLADES TOWARD POSITIONS OF GREATER PITCH WITH RESPECT TO THE PATH OF FLOW OF THE IMPELLING FLUID, ACTUATABLE MEANS
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |