US3511282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed conduit for heated fluids
Assignee: ConocoPhillips Co
•
Filing: 1966-02-07
•
Granted: 1970-05-12
•
Expires: 1986-02-07
Abstract
No abstract record available.
Inventors
- 👤 Glen Paul Willhite
- 👤 William L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:20
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; F16L59/08; F16L59/12; F16L59/123; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2696835A
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US2923650A
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US2819761A
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US2930407A
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US2924245A
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US3169576A
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US3065768A
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US3246394A
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US3213889A
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US3250297A
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US3397720A
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US3388724A
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US3349017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-11 | 1973-11-10 | 1974-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-11 | 1977-11-10 | 1978-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-11 | 1981-11-10 | 1982-05-12 | $7700.00 | Window Closed / Lapsed |