US3294695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibiting compositions and processes
Assignee: Armour and Co
•
Filing: 1962-06-27
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Granted: 1966-12-27
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Charles E Tippett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:00
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A COMPOSITION FOR INHIBITING CORROSION OF FERROUS METALS IN CONTACT WITH AQUEOUS SOLUTIONS OF CORRODING ACIDS, CONSISTING ESSENTIALLY OF DIBUTYLTHIOUREA AND FROM ABOUT 50 TO 90 WEIGHT PERCENT, BASED UPON TOTAL WEIGHT OF THE COMPOSITION, OF A COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
41 words
A COMPOSITION FOR INHIBITING CORROSION OF FERROUS METALS IN CONTACT WITH AQUEOUS SOLUTIONS OF CORRODING ACIDS, CONSISTING ESSENTIALLY OF DIBUTYLTHIOUREA AND FROM ABOUT 50 TO 90 WEIGHT PERCENT, BASED UPON TOTAL WEIGHT OF THE COMPOSITION, OF A COMPOUND HAVING THE STRUCTURE:
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) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |