US2955087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions and methods for treating metal surfaces
Assignee: ARTHUR D BERRYMAN
•
Filing: 1957-04-08
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Granted: 1960-10-04
•
Expires: 1977-04-08
Abstract
No abstract record available.
Inventors
- 👤 Charles H Elbreder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:29
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; C23G1/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
AN ACID COMPOSITION HAVING AN INHIBITED CORROSION ACTIVITY RELATIVE TO METAL SURFACES COMPRISING AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULFURIC ACID, SULFAMIC ACID AND PHOSPHORIC ACID, AND APPROXIMATELY 0.01% TO 2% BY WEIGHT, BASED UPON THE WEIGHT OF SAID ACID COMPOUND, OF A COMPOUND SELECTED FROM THE GROUP OF COMPOUNDS OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
58 words
AN ACID COMPOSITION HAVING AN INHIBITED CORROSION ACTIVITY RELATIVE TO METAL SURFACES COMPRISING AN ACID SELECTED FROM THE GROUP CONSISTING OF HYDROCHLORIC ACID, SULFURIC ACID, SULFAMIC ACID AND PHOSPHORIC ACID, AND APPROXIMATELY 0.01% TO 2% BY WEIGHT, BASED UPON THE WEIGHT OF SAID ACID COMPOUND, OF A COMPOUND SELECTED FROM THE GROUP OF COMPOUNDS OF THE GENERAL 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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |