US2506494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling assembly for rotary drill hose
Assignee: WHITEHEAD BROTHERS RUBBER Co
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Filing: 1948-01-09
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Granted: 1950-05-02
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Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 John C Feiler
- 👤 William L Stivason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:04
CPC Classifications
F; F16; F16L; F16L33/00; F16L33/003
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) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |