US3222998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two dimensional hydraulic tracing system
Assignee: Milacron Inc
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Filing: 1963-11-14
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Granted: 1965-12-14
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Expires: 1983-11-14
Abstract
No abstract record available.
Inventors
- 👤 John F Verhoeven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/18; B23Q2735/00; B23Q2735/02; B23Q2735/08; B23Q2735/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A HYDRAULIC TRACING VALVE HAVING A SET OF MOTOR PORTS FOR CONNECTION TO OPPOSITE SIDES OF A SINGLE HYDRAULIC MOTOR AND HAVING A SET OF OPERATING PORTS FOR CONNECTION TO A PRESSURE AND RETURN LINE, ONE OF SAID SETS HAVING THREE PORTS AND THE OTHER SET HAVING TWO PORTS, SAID VALVE MEMBER HAVING A PLURALITY OF SPACED LANDS OPERABLE TO BLOCK A PORT WHEN IN FULL REGISTRATION THEREWITH, SAID LANDS SPACED TO BLOCK ALL OF THE PORTS OF SAID ONE SET OF PORTS WHEN THE VALVE MEMBER IS IN A CENTERED POSITION AND TO EXPOSE
Claim 2
Dependent Claim
95 words
A HYDRAULIC TRACING VALVE HAVING A SET OF MOTOR PORTS FOR CONNECTION TO OPPOSITE SIDES OF A SINGLE HYDRAULIC MOTOR AND HAVING A SET OF OPERATING PORTS FOR CONNECTION TO A PRESSURE AND RETURN LINE, ONE OF SAID SETS HAVING THREE PORTS AND THE OTHER SET HAVING TWO PORTS, SAID VALVE MEMBER HAVING A PLURALITY OF SPACED LANDS OPERABLE TO BLOCK A PORT WHEN IN FULL REGISTRATION THEREWITH, SAID LANDS SPACED TO BLOCK ALL OF THE PORTS OF SAID ONE SET OF PORTS WHEN THE VALVE MEMBER IS IN A CENTERED POSITION AND TO EXPOSE
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |