Patent US3672125A successfully refreshed from Google Patents.
US3672125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nta solid support for hydrogen sulfide removal
Assignee: ChampionX LLC
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Filing: 1971-01-28
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Granted: 1972-06-27
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Expires: 1991-01-28
Abstract
Abstract A method of removing hydrogen sulfide from gaseous streams by means of a nitrilotriacetic acid-ferric complex sorbed on a silica-alumina support.
Inventors
- 👤 Richard C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:28
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/52; B01D53/523
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A method according to claim 1 wherein the support is a high alumina/low silica sorptive clay in the form of microspheres.
Claim 2
Dependent Claim
21 words
A method according to claim 1 wherein the support is a low alumina/high silica sorptive clay in the form of microspheres.
Claim 3
Dependent Claim
14 words
A method according to claim 1 wherein the support is a crystalline metal aluminosilicate.
Claim 4
Dependent Claim
30 words
A method according to claim 1 wherein the treating solution is buffered to maintain a pH in the range of from about 5.0 to 6.5 utilizing an alkali metal carbonate.
References Cited (Backward Citations)
GB769854A
Cited
US3363401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |