US3068065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing hydrogen sulphide from gases
Assignee: Humphreys and Glasgow Ltd
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Filing: 1957-08-19
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Granted: 1962-12-11
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Expires: 1977-08-19
Abstract
No abstract record available.
Inventors
- 👤 Hartley Wilfred
- 👤 Craig Ronald Stewart
- 👤 Sapiro Reuben Hillel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:58
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/124; C10K1/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE REMOVAL OF HYDROGEN SULPHIDE FROM GASES IN WHICH IT IS PRESENT AS AN IMPURITY IN WHICH PROCESS THE GAS IS WASHED WITH A SOLUTION OF IRON COMPLEXED WITH A POLYAMINO POLYCARBOXYLIC ACID IN WHICH THE AMINO GROUPS ARE SEPARATED FROM EACH OTHER BY AT LEAST TWO CARBON ATOMS, THE IRON BEING IN THE FERRIC STATE FOR GAS-WASHING, THE SAID SOLUTION AFTER CONTACT WITH THE IMPURE GAS BEING REGENERATED BY AERATION FOR RE-USE.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE REMOVAL OF HYDROGEN SULPHIDE FROM GASES IN WHICH IT IS PRESENT AS AN IMPURITY IN WHICH PROCESS THE GAS IS WASHED WITH A SOLUTION OF IRON COMPLEXED WITH A POLYAMINO POLYCARBOXYLIC ACID IN WHICH THE AMINO GROUPS ARE SEPARATED FROM EACH OTHER BY AT LEAST TWO CARBON ATOMS, THE IRON BEING IN THE FERRIC STATE FOR GAS-WASHING, THE SAID SOLUTION AFTER CONTACT WITH THE IMPURE GAS BEING REGENERATED BY AERATION FOR RE-USE.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |