US3676091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming and circulating plugs in a pipeline
Assignee: Shell USA Inc
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Filing: 1970-09-08
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Granted: 1972-07-11
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Expires: 1990-09-08
Abstract
Abstract A METHOD FOR FORMING AND CIRUCLATING A PLUG WITHIN A PIPELINE HAVING A GASSTREAM FLOWING THERIN BY REACTING WATER WITH GAS TO FORM A GAS HYDRATE PLUG WHICH IS SUBSEQUENTLY CIRCULATED THROUGH THE PIPELINE.
Inventors
- 👤 John P Fraser
- 👤 David E Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:36
CPC Classifications
F; F17; F17D; F17D3/00; F17D3/03; F17D3/08; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/053; B08B9/055; B08B9/0555; B08B9/0556; F16; F16L; F16L2101/00; F16L2101/40; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/0435
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |