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US2616264A
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Hydraulic by-pass control
Assignee: Hughes Tool Co
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Filing: 1948-02-06
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Granted: 1952-11-04
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Expires: 1968-02-06
Abstract
No abstract record available.
Inventors
- 👤 Grant David
- 👤 Leland V Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:12
CPC Classifications
F; F15; F15B; F15B18/00; F15B11/00; F15B11/16; F15B11/17; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/40; F15B2211/405; F15B2211/40515; F15B2211/415; F15B2211/41527; F15B2211/41536; F15B2211/42; F15B2211/428; F15B2211/45; F15B2211/60; F15B2211/65; F15B2211/70; F15B2211/71; F15B2211/7142; F15B2211/78; F15B2211/782
Claims Analysis
Total Claims: 0
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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) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |