US3342213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic apparatus
Assignee: Sperry Gyroscope Co Ltd
•
Filing: 1965-07-20
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Granted: 1967-09-19
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Expires: 1985-07-20
Abstract
No abstract record available.
Inventors
- 👤 Walters Ronald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:23
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0435; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/8671; Y10T137/86718; Y10T137/86734
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A HYDRAULIC SPOOL VALVE COMPRISING A BODY, A PLURALITY OF SETS OF METERING PORTS FOR HYDRAULIC FLUID IN THE WALLS OF SAID VALVE BODY, A SPOOL WITHIN SAID VALVE BODY, SAID SPOOL HAVING RAISED LANDS FOR COOPERATING WITH SAID PORTS, IN WHICH EACH SET OF METERING PORTS FOR THE HYDRAULIC FLUID COMPRISES AT LEAST ONE PORT OF CIRCULAR
Claim 2
Dependent Claim
58 words
A HYDRAULIC SPOOL VALVE COMPRISING A BODY, A PLURALITY OF SETS OF METERING PORTS FOR HYDRAULIC FLUID IN THE WALLS OF SAID VALVE BODY, A SPOOL WITHIN SAID VALVE BODY, SAID SPOOL HAVING RAISED LANDS FOR COOPERATING WITH SAID PORTS, IN WHICH EACH SET OF METERING PORTS FOR THE HYDRAULIC FLUID COMPRISES AT LEAST ONE PORT OF CIRCULAR
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |