US2796429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl aryl sulfonates
Assignee: Shell Development Co
•
Filing: 1954-05-17
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Granted: 1957-06-18
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Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Robert W F Kreps
- 👤 Jacobus J Tjepkema
- 👤 Pieter L Kooijman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:52
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
ALKYL ARYL MONOSULFONATES OF THE BENZENE SERIES HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
ALKYL ARYL MONOSULFONATES OF THE BENZENE SERIES HAVING THE GENERAL FORMULA
Claim 3
Dependent Claim
13 words
AN ALKYL ARYL MONOSULFONATE SALT ACCORDING TO CLAIM 1 WHEREIN M REPRESENTS ALKANOLAMINEGROUP.
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |