Patent US3689237A successfully refreshed from Google Patents.
US3689237A
Expired / Lapsed
US
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Fuel gas pipeline system
Assignee: North American Utility Construction Corp
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Filing: 1970-02-19
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Granted: 1972-09-05
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Expires: 1990-02-19
Abstract
Abstract A METHOD OF AND APPARATUS FOR INCREASING THE GAS LOAD OF THE FUEL GAS PIPELINE BY CONTROLLED INFECTION OF A CRYOGENIC LIQUEFIED GAS OR HYDROCARBONS IN LIQUID OR VAPOR FORM DIRECTLY INTO THE GAS LINE, IN CASE OF LIQUID INJECTION TO USE THE HEAT OF THE GAS STREAM TO SUPPLY THE LATENT HEAT OF VAPORIZATION TO VAPORIZE THE LIQUID INJECTED AND TO INCREASE THE QUANTITY OF GAS IN THE LINE AT A GIVEN TIME, WHICH MAY HAVE MEANS TO ACCELERATE THE HEATING OF THE MIXTURE OF CRYOGENIC AND FUEL GAS IN THE PIPELINE TO PREVENT FROST.
Inventors
- 👤 Virgil Stark
- 👤 Arthur E Wastie
- 👤 Jacques Sliosberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:07
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; F15D1/04; B; B01; B01F; B01F23/00; B01F23/10; B01F23/19; B01F23/191; B01F23/20; B01F23/21; B01F23/216; B01F25/00; B01F25/30; B01F25/31; B01F25/312; B01F25/3121; B01F25/3123; B01F25/31232; B01F25/31233; B01F25/32; B01F25/40; B01F25/42; B01F25/43; B01F25/432; B01F25/4321; B01F25/43211; B01F35/00; B01F35/20; B01F35/21; B01F35/211; B01F35/2113; B01F35/2115; B01F35/213; B01F35/22; B01F35/221; B01F35/2211; B01F35/71; B01F35/717; B01F35/7174; B01F35/80; B01F35/83; B01F35/833; B01F35/90; B01F35/92; F16; F16L; F16L55/00; F17; F17D; F17D1/00; F17D1/08; F17D1/16; B01F2025/91; B01F2025/919; B01F2025/9191; B01F2025/91912; B01F2035/99; B01F2101/00; B01F2101/503; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324; Y10T137/0329; Y10T137/0346; Y10T137/2496; Y10T137/2559; Y10T137/2562; Y10T137/8593; Y10T137/87265; Y10T137/87338; Y10T137/87346; Y10T137/87571; Y10T137/87587; Y10T137/87619; Y10T137/87627; Y10T137/87643
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |