Patent US3137654A successfully refreshed from Google Patents.
US3137654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of aqueous alkanolamine solutions in gas treating processes
Assignee: Individual
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Filing: 1961-03-28
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Granted: 1964-06-16
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Expires: 1981-03-28
Abstract
No abstract record available.
Inventors
- 👤 Wayne W Johnson
- 👤 Robert E Mcelwain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:26
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/12; C10K1/14; C10K1/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD FOR STABILIZING AN AQUEOUS MONOETHANOLAMINE SOLUTION AGAINST DETERIORATION COMPRISING INCORPORATING IN SAID SOLUTION A CHELATING AGENT SELECTED FROM A GROUP OF COMPOUNDS CONSISTING OF N,N-DIHYDROXYEHYLGLYCINE, SALTS OF N,-DIHYDROXYETHYLGLYCINE, N-HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID, SALTS OF N-HYDROXYETHYLENYLENEDIAMINETRIACETIC, ETHYLENEDIAMINETETRAACETIC ACID, AND SALTS OF ETHYLENEDIAMINETETRA-ACETIC ACID, SAID AGENT BEING INCORPORATED IN SUFFICIENT QUANTITY TO PROVIDE A CONCENTRATION IN SAID SOLUTION OF 1.1-4.5 VOLUME PERCENT.
Claim 2
Independent Claim
60 words
A METHOD FOR STABILIZING AN AQUEOUS MONOETHANOLAMINE SOLUTION AGAINST DETERIORATION COMPRISING INCORPORATING IN SAID SOLUTION A CHELATING AGENT SELECTED FROM A GROUP OF COMPOUNDS CONSISTING OF N,N-DIHYDROXYEHYLGLYCINE, SALTS OF N,-DIHYDROXYETHYLGLYCINE, N-HYDROXYETHYLETHYLENEDIAMINETRIACETIC ACID, SALTS OF N-HYDROXYETHYLENYLENEDIAMINETRIACETIC, ETHYLENEDIAMINETETRAACETIC ACID, AND SALTS OF ETHYLENEDIAMINETETRA-ACETIC ACID, SAID AGENT BEING INCORPORATED IN SUFFICIENT QUANTITY TO PROVIDE A CONCENTRATION IN SAID SOLUTION OF 1.1-4.5 VOLUME PERCENT.
References Cited (Backward Citations)
USRE23905E
Cited
GB461011A
Cited
US2442457A
Cited
US2559580A
Cited
US2723222A
Cited
US2869978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |