US2640029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing corrosion
Assignee: Baker Petrolite LLC
•
Filing: 1951-05-23
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Granted: 1953-05-26
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Expires: 1971-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles M Blair
- 👤 William F Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:16
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; Y; Y10; Y10S; Y10S166/00; Y10S166/902; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PROCESS FOR PREVENTING CORROSION OF METALS INCLUDING THE STEP OF APPLYING TO SUCH METALS A SUBSTITUTED TETRAHYDROPYRIMIDINE OF THE FORMULA TYPE.
Claim 2
Dependent Claim
22 words
A PROCESS FOR PREVENTING CORROSION OF METALS INCLUDING THE STEP OF APPLYING TO SUCH METALS A SUBSTITUTED TETRAHYDROPYRIMIDINE OF THE FORMULA TYPE.
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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |