US2664162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for installing and removing flow valves
Assignee: SID W RICHARDSON Inc
•
Filing: 1948-06-24
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Granted: 1953-12-29
•
Expires: 1968-06-24
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Howard
- 👤 Jr Harold E Mcgowen
- 👤 Jr Howard H Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:26
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/03; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934; Y10T137/3149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2401119A
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US2380669A
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US2452920A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |