Patent US4459591A successfully refreshed from Google Patents.
Patent US3183993A successfully refreshed from Google Patents.
US3183993A
Expired / Lapsed
US
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Speed control system
Assignee: Motors Liquidation Co
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Filing: 1961-06-07
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Granted: 1965-05-18
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Expires: 1981-06-07
Abstract
No abstract record available.
Inventors
- 👤 Leland C Parker
- 👤 Donald D Stoltman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0971; Y10T137/1044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A DYNAMIC FLUID PRESSURE SYSTEM HAVING A FIRST FLUID PRESSURE SOURCE FOR PRODUCING A FIRST VARIABLE PRESSURE AND A SECOND FLUID PRESSURE SOURCE FOR PRODUCING A SECOND PRESSURE GREATER THAN SAID FIRST PRESSURE, FLUID PRESSURE MODIFICATION MECHANISM COMPRISING A CHAMBER, FIRST MEANS METERING SAID FIRST PRESSURE INTO SAID CHAMBER IN INVERSE RELATION TO VARIATIONS IN SAID FIRST PRESSURE, SECOND
Claim 2
Dependent Claim
60 words
IN A DYNAMIC FLUID PRESSURE SYSTEM HAVING A FIRST FLUID PRESSURE SOURCE FOR PRODUCING A FIRST VARIABLE PRESSURE AND A SECOND FLUID PRESSURE SOURCE FOR PRODUCING A SECOND PRESSURE GREATER THAN SAID FIRST PRESSURE, FLUID PRESSURE MODIFICATION MECHANISM COMPRISING A CHAMBER, FIRST MEANS METERING SAID FIRST PRESSURE INTO SAID CHAMBER IN INVERSE RELATION TO VARIATIONS IN SAID FIRST PRESSURE, SECOND
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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) | 1968-05-17 | 1968-11-16 | 1969-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-17 | 1972-11-16 | 1973-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-17 | 1976-11-16 | 1977-05-18 | $7700.00 | Window Closed / Lapsed |