US3137642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for protecting structures, machinery containers, etc. made of steel, copper, brass, bronze or similar materials against corrosion
Assignee: Individual
•
Filing: 1960-04-13
•
Granted: 1964-06-16
•
Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Winthrop A Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/12; C23F13/14; C22; C22C; C22C18/00; C22C20/00; C22C21/00; C22C21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
METHOD OF PROTECTING A BODY OF IRON, STEEL OR OTHER METALS AGAINST COROSION IN THE PRESENCE OF A WATER SOLUTION CONTAINING AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF CL-, SO3--, SO4--, CO3-- AND BRWHICH COMPRISES ATTACHING THERETO IN METAL-TO-METAL CONTACT A BODY OF AN ALLOY HAVING A COMPOSITION WITHIN THE RANGES-
Claim 2
Dependent Claim
54 words
METHOD OF PROTECTING A BODY OF IRON, STEEL OR OTHER METALS AGAINST COROSION IN THE PRESENCE OF A WATER SOLUTION CONTAINING AT LEAST ONE ION SELECTED FROM THE GROUP CONSISTING OF CL-, SO3--, SO4--, CO3-- AND BRWHICH COMPRISES ATTACHING THERETO IN METAL-TO-METAL CONTACT A BODY OF AN ALLOY HAVING A COMPOSITION WITHIN THE RANGES-
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |