Patent US3550505A successfully refreshed from Google Patents.
US3550505A
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Hydraulic system including two work circuits
Assignee: SPX Technologies Inc
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Filing: 1969-05-07
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Granted: 1970-12-29
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Expires: 1989-05-07
Abstract
No abstract record available.
Inventors
- 👤 James O Byers Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:31
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B2211/00; F15B2211/30; F15B2211/31; F15B2211/3105; F15B2211/3111; F15B2211/40; F15B2211/405; F15B2211/40507; F15B2211/40515; F15B2211/40523; F15B2211/4053; F15B2211/42; F15B2211/428; F15B2211/45; F15B2211/60; F15B2211/605; F15B2211/6051; F15B2211/70; F15B2211/71; F15B2211/7142; F15B2211/78; F15B2211/781
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |