US3415199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic downhole gas lift apparatus
Assignee: Macco Oil Tool Co Inc
•
Filing: 1966-10-13
•
Granted: 1968-12-10
•
Expires: 1986-10-13
Abstract
No abstract record available.
Inventors
- 👤 James K Elliott
- 👤 Jr Joe E Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:33
CPC Classifications
F; F04; F04F; F04F1/00; F04F1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US122332A
Cited
US2207318A
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US2177517A
Cited
US2223417A
Cited
US2764104A
Cited
US2730961A
Cited
US3302586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-10 | 1972-06-10 | 1972-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-10 | 1976-06-10 | 1976-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-10 | 1980-06-10 | 1980-12-10 | $7700.00 | Window Closed / Lapsed |