US3035642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the flow of production fluid from a well
Assignee: Page Oil Tools Inc
•
Filing: 1957-08-09
•
Granted: 1962-05-22
•
Expires: 1977-08-09
Abstract
No abstract record available.
Inventors
- 👤 John S Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:55
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/06; E21B34/10; E21B2200/00; E21B2200/05; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7918
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1839402A
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US2282987A
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US2665759A
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US2766831A
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US2681705A
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US2649916A
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US2717041A
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US2812820A
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US2760578A
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US2780290A
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US2798561A
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GB774785A
Cited
GB774783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |