US2545137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors
Assignee: Shell Development Co
•
Filing: 1947-03-14
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Granted: 1951-03-13
•
Expires: 1967-03-14
Abstract
No abstract record available.
Inventors
- 👤 David Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2203/10; C10M2203/102; C10M2203/104; C10M2203/106; C10M2203/108; C10M2205/00; C10M2205/14; C10M2205/16; C10M2205/17; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2207/046; C10M2207/08; C10M2207/10; C10M2207/12; C10M2207/125; C10M2207/129; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/40; C10M2207/404; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/082; C10M2209/10; C10M2209/103; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/06; C10M2215/00; C10M2215/02; C10M2215/20; C10M2215/202; C10M2219/00; C10M2219/04; C10M2219/042; C10M2219/044; C10N; C10N2010/00; C10N2010/02; C10N2010/04; C10N2030/00; C10N2030/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COMPOSITION FOR DISPLACING MOISTURE FROM AND PREVENTING CORROSION OF METALS HAVING THE FOLLOWING FORMULA AND PROPORTIONS: SP* PER CENT BY WEIGHT LIGHT PETROLEUM HYDROCARBONS BOILING BETWEEN ABOUT 50 TO 370* C 78 NA SALT OF SULFONIC ACID DERIVED BY DIRECT SULFONATION OF A PETROLEUM FRACTION CONTAI
Claim 2
Dependent Claim
47 words
A COMPOSITION FOR DISPLACING MOISTURE FROM AND PREVENTING CORROSION OF METALS HAVING THE FOLLOWING FORMULA AND PROPORTIONS: SP* PER CENT BY WEIGHT LIGHT PETROLEUM HYDROCARBONS BOILING BETWEEN ABOUT 50 TO 370* C 78 NA SALT OF SULFONIC ACID DERIVED BY DIRECT SULFONATION OF A PETROLEUM FRACTION CONTAI
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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) | 1954-03-12 | 1954-09-11 | 1955-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-12 | 1958-09-11 | 1959-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-12 | 1962-09-11 | 1963-03-13 | $7700.00 | Window Closed / Lapsed |