Patent US2881139A successfully refreshed from Google Patents.
US2881139A
Expired / Lapsed
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Corrosion preventing compositions and process
Assignee: Novartis AG
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Filing: 1955-08-22
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Granted: 1959-04-07
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Expires: 1975-08-22
Abstract
No abstract record available.
Inventors
- 👤 Gysling Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:07
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/16; C23G1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
2. A PROCESS OF PREVENTING THE CORROSION OF COPPERY METAL SURFACES BY ALKALINE AQUEOUS SOLUTIONS OF A WATER SOLUBLAE CLEANSING AGENT NORMALLY TENDING IN AQUEOUS SOLUBLE TO CAUSE CORROSION OF COPPER METAL, WHICH COMPRISES BRINGING SAID COPPERY METAL SURFACES INTO CONTACT WITH ALKALINE AQUEOUS SOLUTIONS OF A WATER-SOLUBLE CLEANSING AGENT CONTAINING FROM 1 TO 100 PARTS PER MILLION OF A CORROSION INHIBITOR OF THE FORMULA
Claim 2
Dependent Claim
65 words
2. A PROCESS OF PREVENTING THE CORROSION OF COPPERY METAL SURFACES BY ALKALINE AQUEOUS SOLUTIONS OF A WATER SOLUBLAE CLEANSING AGENT NORMALLY TENDING IN AQUEOUS SOLUBLE TO CAUSE CORROSION OF COPPER METAL, WHICH COMPRISES BRINGING SAID COPPERY METAL SURFACES INTO CONTACT WITH ALKALINE AQUEOUS SOLUTIONS OF A WATER-SOLUBLE CLEANSING AGENT CONTAINING FROM 1 TO 100 PARTS PER MILLION OF A CORROSION INHIBITOR OF THE FORMULA
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |