US3141898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2, 2-dimethyl-2-silaalkane-sulfonic acids and their salts
Assignee: 3M Co
•
Filing: 1961-01-03
•
Granted: 1964-07-21
•
Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Tiers George Van Dyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:10
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/281; C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0803; C07F7/081; C11; C11D; C11D1/00; C11D1/66; C11D1/82; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A COMPOUND OF THE GROUP CONSISTING OF SULFONIC ACIDS REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
13 words
A COMPOUND OF THE GROUP CONSISTING OF SULFONIC ACIDS REPRESENTED BY THE FORMULA
References Cited (Backward Citations)
US2789121A
Cited
US2955128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |