Patent US3422892A successfully refreshed from Google Patents.
US3422892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supply of high-pressure combustion-supporting gas to wells
Assignee: Airco Inc
•
Filing: 1965-03-29
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Granted: 1969-01-21
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Expires: 1985-03-29
Abstract
No abstract record available.
Inventors
- 👤 Horace B Bryant Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:45
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B36/00; E21B36/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2712351A
Cited
US2901043A
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US3026937A
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US3097690A
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US3066737A
Cited
US3055427A
Cited
US3100528A
Cited
US3195634A
Cited
US3209822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |