Patent US2878149A successfully refreshed from Google Patents.
US2878149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Product for effecting a cold chemical oxidation of copper and its alloys
Assignee: Individual
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Filing: 1955-10-31
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Granted: 1959-03-17
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Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Walter A Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:41
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/48; C23C22/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SOLUTION BATCH CONSISTING OF IN PROPORTION APPROXIMATELY 3 TO 12 POUNDS OF A COPPER BLACKENING AGENT SELECTED FROM THE GROUP CONSISTING OF OXYGEN ACIDS AND SALTS OF SELENIUM AND TELLURIUM, A COPPER SALT IN AN AMOUNT BY WEIGHT APPROXIMATELY EQUAL PLUS OR MINUS 15% TO THE WEIGHT OF COPPER BLACKENING AGENT, APPROXIMATELY 2 TO 6 POUNDS OF ARSENIC TRIOXIDE, APPROXIMATELY 110 TO 170 FLUID OUNCES OF HYDROCHLORIC ACID, APPROXIMATELY 2 TO 4 POUNDS OF ALKYLARYL SURFACE, APPROXIMATELY 5 TO 20 GALLONS OF AN ALCOHOL, AND APPROXIMATELY 22 TO 54 GALLONS OF WATER.
Claim 2
Dependent Claim
93 words
A SOLUTION BATCH CONSISTING OF IN PROPORTION APPROXIMATELY 3 TO 12 POUNDS OF A COPPER BLACKENING AGENT SELECTED FROM THE GROUP CONSISTING OF OXYGEN ACIDS AND SALTS OF SELENIUM AND TELLURIUM, A COPPER SALT IN AN AMOUNT BY WEIGHT APPROXIMATELY EQUAL PLUS OR MINUS 15% TO THE WEIGHT OF COPPER BLACKENING AGENT, APPROXIMATELY 2 TO 6 POUNDS OF ARSENIC TRIOXIDE, APPROXIMATELY 110 TO 170 FLUID OUNCES OF HYDROCHLORIC ACID, APPROXIMATELY 2 TO 4 POUNDS OF ALKYLARYL SURFACE, APPROXIMATELY 5 TO 20 GALLONS OF AN ALCOHOL, AND APPROXIMATELY 22 TO 54 GALLONS OF WATER.
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) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |