Patent US3285320A successfully refreshed from Google Patents.
US3285320A
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Method and apparatus for controlling flow of fuel gas
Assignee: Standard Oil Co
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Filing: 1965-12-10
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Granted: 1966-11-15
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Expires: 1985-12-10
Abstract
No abstract record available.
Inventors
- 👤 John B Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:50
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; C10G9/206; F; F23; F23N; F23N1/00; F23N1/08; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0324
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
THE METHOD OF AUTOMATICALLY AND CONTINUALLY CONTROLLING HEAT INPUT TO A GAS-FIRED FURNACE UTILIZING FUEL GAS OF VARYING HEAT CONTENT, WHICH METHOD COMPRISING THE STEPS OF CONTINUALLY DETERMINING THE SPECIFIC GRAVITY OF SAID INPUT FUEL GAS, SAID SPECIFIC GRAVITY DETERMINATIONS
Claim 2
Independent Claim
40 words
THE METHOD OF AUTOMATICALLY AND CONTINUALLY CONTROLLING HEAT INPUT TO A GAS-FIRED FURNACE UTILIZING FUEL GAS OF VARYING HEAT CONTENT, WHICH METHOD COMPRISING THE STEPS OF CONTINUALLY DETERMINING THE SPECIFIC GRAVITY OF SAID INPUT FUEL GAS, SAID SPECIFIC GRAVITY DETERMINATIONS
References Cited (Backward Citations)
US1849335A
Cited
US3211372A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |