US2913408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitors for ferrous metals in aqueous solutions of non-oxidizing acids
Assignee: Dow Chemical Co
•
Filing: 1956-12-28
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Granted: 1959-11-17
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Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Charles T Pumpelly
- 👤 Joseph L Wasco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:08
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/068; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN AQUEOUS SOLUTION OF A NON-OXIDIZING ACID CONCTAINING AN EFFECTIVE AMOUNT OF A CORROSION INHIBITOR CONSISTING SOLELY OF A COMPOUND CORRSPONDING TO THE FORMULA
Claim 2
Dependent Claim
24 words
AN AQUEOUS SOLUTION OF A NON-OXIDIZING ACID CONCTAINING AN EFFECTIVE AMOUNT OF A CORROSION INHIBITOR CONSISTING SOLELY OF A COMPOUND CORRSPONDING TO 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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |