Patent US2683560A successfully refreshed from Google Patents.
Patent US3199946A successfully refreshed from Google Patents.
US3199946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of hydrogen sulfide from hydrocarbon fuel gases
Assignee: Honolulu Gas Co
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Filing: 1963-07-23
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Granted: 1965-08-10
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Expires: 1983-07-23
Abstract
No abstract record available.
Inventors
- 👤 Robert K Fujita
- 👤 Howard D Hole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:06
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A METHOD OF REMOVING HYDROGEN SULFIDE FROM HYDROCARBON FUEL GAS WHICH COMPRISES THE STEPS OF FORMING AN ADMIXTURE OF FINELY-DIVIDED IRON METAL, AN ALKALINE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL BICARBONATES AND ALKALI METAL HYDROXIDES, AND FROM ABOUT 10% TO ABOUT 75% BY WEIGHT
Claim 2
Independent Claim
50 words
A METHOD OF REMOVING HYDROGEN SULFIDE FROM HYDROCARBON FUEL GAS WHICH COMPRISES THE STEPS OF FORMING AN ADMIXTURE OF FINELY-DIVIDED IRON METAL, AN ALKALINE SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL BICARBONATES AND ALKALI METAL HYDROXIDES, AND FROM ABOUT 10% TO ABOUT 75% BY WEIGHT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |