US3234855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic system
Assignee: Caterpillar Inc
•
Filing: 1964-09-29
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Granted: 1966-02-15
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Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Allan L Freedy
- 👤 Donald R Muellner
- 👤 Fredric G Parr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:25
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/04; F15B21/044; E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34; E02F3/3405; E02F3/3411; E02F9/00; E02F9/20; E02F9/22; E02F9/226
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A HYDRAULIC SYSTEM OF THE TYPE INCLUDING A MASTER VALVE OPERATING TO INCREASE THE PRESSURE OF HYDRAULIC FLUID TO EFFECT OPERATION OF A VALVE DETENT IN COMMUNICATION THEREWITH, THE COMBINATION WITH SAID MASTER VALVE AND VALVE DETENT OF A SOURCE OF HYDRAULIC FLUID, MEANS COMMUNICATING SAID HYDRAULIC FLUID TO SAID MASTER VALVE AND TO
Claim 2
Dependent Claim
54 words
A HYDRAULIC SYSTEM OF THE TYPE INCLUDING A MASTER VALVE OPERATING TO INCREASE THE PRESSURE OF HYDRAULIC FLUID TO EFFECT OPERATION OF A VALVE DETENT IN COMMUNICATION THEREWITH, THE COMBINATION WITH SAID MASTER VALVE AND VALVE DETENT OF A SOURCE OF HYDRAULIC FLUID, MEANS COMMUNICATING SAID HYDRAULIC FLUID TO SAID MASTER VALVE AND TO
References Cited (Backward Citations)
US2830859A
Cited
US2970655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |