US3436919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground sealing
Assignee: ConocoPhillips Co
•
Filing: 1966-05-09
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Granted: 1969-04-08
•
Expires: 1986-05-09
Abstract
No abstract record available.
Inventors
- 👤 D Arcy A Shock
- 👤 John D Sudbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
E; E02; E02D; E02D27/00; E02D27/32; E02D27/38; E02D19/00; E02D19/06; E02D19/12; E02D19/14; E04; E04H; E04H7/00; E04H7/02; E21; E21D; E21D1/00; E21D1/10; E21D1/12; E21F; E21F17/00; F; F17; F17C; F17C3/00; F17C3/005; F17C2203/00; F17C2203/06; F17C2203/0634; F17C2203/0678; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2227/00; F17C2227/03; F17C2227/0337; F17C2227/0341; F17C2227/0367; F17C2227/0369; F17C2227/0376; F17C2260/00; F17C2260/03; F17C2260/031; F17C2260/032; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0149; F17C2270/0157; F17C2270/0163
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US363419A
Cited
US464771A
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US786382A
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US829664A
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US2368424A
Cited
US2961840A
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US3183675A
Cited
US3271962A
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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) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |