Patent US2989564A successfully refreshed from Google Patents.
US2989564A
Expired / Lapsed
US
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Nu-substituted aminopropylamine monosulfonates
Assignee: Gulf Research and Development Co
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Filing: 1954-08-12
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Granted: 1961-06-20
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Expires: 1974-08-12
Abstract
No abstract record available.
Inventors
- 👤 Henry A Ambrose
- 👤 Earl L Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:04
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2431; C10L1/2437; C10M; C10M1/00; C10M1/08; C10M2219/00; C10M2219/04; C10M2219/044; C10N; C10N2040/00; C10N2040/04; C10N2040/042; C10N2040/044; C10N2040/046; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A MONOSULFONATE OF AN OIL-SOLUBLE HYDROCARBON SULFONIC ACID AND A 1,3-DIAMINOPROPANE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
15 words
A MONOSULFONATE OF AN OIL-SOLUBLE HYDROCARBON SULFONIC ACID AND A 1,3-DIAMINOPROPANE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |