US3275403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of carbon dioxide and hydrogen sulfide from gaseous mixtures
Assignee: Girdler Corp
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Filing: 1962-08-22
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Granted: 1966-09-27
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Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Bertrand J Mayland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:56
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/124; C10K1/125; C10K1/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A REGENERATIVE PROCESS FOR REMOVING CONTAMINANTS, INCLUDING CARBON DIOXIDE AS THE PRINCIPAL CONTAMINANT AND HYDROGEN SULFIDE AS A SUBSTANTIAL CONTAMINANT, FROM GASEOUS MIXTURES, WHEREIN THE CONTAMINATED GASEOUS MIXTURES ARE BROUGHT INTO INTIMATE CONTACT WITH A SOLUTION OF POTASSIUM CARBONATE, SAID SOLUTION CONTAINING IRON IONS RESULTING IN THE PRODUCTION OF A DIFFICLUTY FILTRABLE IRON SULFIDE PECIPITATE, THE STEP OF MAINTAINING IN THE SAID SOLUTION FROM ABOUT 5% TO ABOUT 2% OF AN AMINE CHOSEN FROM THE CLASS CONSISTING OF MONETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE AND MIXTURES THEREOF, TO CAUSE SAID IRON SULFIDE TO PRECIITATE AT AN INCREASED RATE AND WITH A LARGER PARTICLE SIZE, THEREBY MAKING SAID PERCIPITATE READILY FILTRABLE, AND FILTERING SAID PRECIPITATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
115 words
IN A REGENERATIVE PROCESS FOR REMOVING CONTAMINANTS, INCLUDING CARBON DIOXIDE AS THE PRINCIPAL CONTAMINANT AND HYDROGEN SULFIDE AS A SUBSTANTIAL CONTAMINANT, FROM GASEOUS MIXTURES, WHEREIN THE CONTAMINATED GASEOUS MIXTURES ARE BROUGHT INTO INTIMATE CONTACT WITH A SOLUTION OF POTASSIUM CARBONATE, SAID SOLUTION CONTAINING IRON IONS RESULTING IN THE PRODUCTION OF A DIFFICLUTY FILTRABLE IRON SULFIDE PECIPITATE, THE STEP OF MAINTAINING IN THE SAID SOLUTION FROM ABOUT 5% TO ABOUT 2% OF AN AMINE CHOSEN FROM THE CLASS CONSISTING OF MONETHANOLAMINE, DIETHANOLAMINE, TRIETHANOLAMINE AND MIXTURES THEREOF, TO CAUSE SAID IRON SULFIDE TO PRECIITATE AT AN INCREASED RATE AND WITH A LARGER PARTICLE SIZE, THEREBY MAKING SAID PERCIPITATE READILY FILTRABLE, AND FILTERING SAID PRECIPITATE FROM SAID SOLUTION.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |