US2534690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: Hughes Tool Co
•
Filing: 1945-09-10
•
Granted: 1950-12-19
•
Expires: 1965-09-10
Abstract
No abstract record available.
Inventors
- 👤 Jr John Young
- 👤 Robert J Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/22; F16L3/223; F16L3/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US229403A
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GB190106884A
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US1668953A
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CH120913A
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US1804416A
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FR736735A
Cited
US1919319A
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US2215283A
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US2223273A
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US2342958A
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US2338660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-18 | 1954-06-19 | 1954-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-18 | 1958-06-19 | 1958-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-18 | 1962-06-19 | 1962-12-19 | $7700.00 | Window Closed / Lapsed |