Patent US3177233A successfully refreshed from Google Patents.
US3177233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil-soluble polyvalent metal salts of alkyl mercaptomethyl phosphonic acid
Assignee: Shell USA Inc
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Filing: 1963-08-30
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Granted: 1965-04-06
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 George M Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:58
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2608; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A POLYVALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF FE, CD, ZN AND AL OF AN ACID HAVING THE FORMULA
Claim 2
Dependent Claim
21 words
A POLYVALENT METAL SALT SELECTED FROM THE GROUP CONSISTING OF FE, CD, ZN AND AL OF AN ACID HAVING THE FORMULA
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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) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |