US2592325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well flow regulating apparatus
Assignee: Individual
•
Filing: 1943-01-28
•
Granted: 1952-04-08
•
Expires: 1963-01-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Otis
- 👤 John C Luccous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/08; E21B34/02; E21B34/025; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7932
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1913489A
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US1972791A
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US2006909A
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US2156429A
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US2196535A
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US2316383A
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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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |