US2957762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-corrosive ammoniacal ammonium salt solutions
Assignee: Collier Carbon and Chemical Corp
•
Filing: 1956-05-07
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Granted: 1960-10-25
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Expires: 1976-05-07
Abstract
No abstract record available.
Inventors
- 👤 Donald C Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:39
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/06; C05; C05C; C05C1/00; C05C1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A PROCESS WHEREIN AN AQUEOUS AMMONIACAL SOLUTION CONSISTING OF AN AMMONIUM SALT OF A STRONG MINERAL ACID AND FREE AMMONIA WHICH IS NORMALLY CORROSIVE WITH RESPECT TO FERROUS METALS IS MAINTAINED IN CONTACT WITH A FERROUS METAL, THE METHOD OF INHIBITING THE CORROSIVE ACTION OF SAID SOLUTION ON SAID METAL WHICH COMPRISES INCORPORATING IN SAID SOLUTION A WATER-SOLUBLE STABLE AMMINE COMPLEX SALT OF A METAL SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS IB, IIB, VIA AND VIII OF THE PERIODIC SYSTEM, SAID METAL-AMMINE SALT BEING PROVIDED IN AN AMOUNT SUFFICIENT TO DECREASE SUBSTANTIALLY THE RATE OF SAID CORROSION.
Claim 2
Dependent Claim
102 words
IN A PROCESS WHEREIN AN AQUEOUS AMMONIACAL SOLUTION CONSISTING OF AN AMMONIUM SALT OF A STRONG MINERAL ACID AND FREE AMMONIA WHICH IS NORMALLY CORROSIVE WITH RESPECT TO FERROUS METALS IS MAINTAINED IN CONTACT WITH A FERROUS METAL, THE METHOD OF INHIBITING THE CORROSIVE ACTION OF SAID SOLUTION ON SAID METAL WHICH COMPRISES INCORPORATING IN SAID SOLUTION A WATER-SOLUBLE STABLE AMMINE COMPLEX SALT OF A METAL SELECTED FROM THE CLASS CONSISTING OF THE METALS OF GROUPS IB, IIB, VIA AND VIII OF THE PERIODIC SYSTEM, SAID METAL-AMMINE SALT BEING PROVIDED IN AN AMOUNT SUFFICIENT TO DECREASE SUBSTANTIALLY THE RATE OF SAID CORROSION.
References Cited (Backward Citations)
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |