Patent US2265057A successfully refreshed from Google Patents.
Patent US3341384A successfully refreshed from Google Patents.
US3341384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissolution of metal with acidified hydrogen peroxide containing dibasic acid
Assignee: Honeywell International Inc
•
Filing: 1964-05-04
•
Granted: 1967-09-12
•
Expires: 1984-05-04
Abstract
No abstract record available.
Inventors
- 👤 Carmelo L Alderuccio
- 👤 Harold F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:23
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
THE METHOD FOR DISSOLUTION OF COPPER AND COPPER ALLOYS WHICH COMPRISES CONTACTING THE METAL WITH AN ACIDIFIED SOLUTION CONTAINING 2-12% BY WEIGHT HYDROGEN PEROXIDE, ABOUT 0.45-5.5 GRAMS PER LITER HYDROGEN ION; AND HAVING INCORPORATED THEREIN A CATALYTIC AMOUNT OF AN ADDITIVE CONTAINING (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENACETIN, SULFATHIAZOLE, SILVER IONS, AND MIXTURES THEREOF, AND (B) AT LEAST 40 PARTS PER MILLION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SATURATED DIBASIC ACIDS OF 4 TO 12 CARBON ATOMS AND HYDROXY AND CARBOXYL SUBSTITUTED SATURATED DIBASIC ACIDS OF 4 TO 12 CARBON ATOMS AND MIXTURES THEREOF, PROVIDED AT LEAST ONE CARBON ATOM ADJACENT A TERMINAL DIBASIC ACID CARBOXYL GROUP IS FREE OF SAID HYDROXY AND CARBOXYL SUBSTITUENTS, SAID SOLUTION BEING REGULATED AT A TEMPERATURE BETWEEN ABOUT 40-65*C.
Claim 2
Independent Claim
132 words
THE METHOD FOR DISSOLUTION OF COPPER AND COPPER ALLOYS WHICH COMPRISES CONTACTING THE METAL WITH AN ACIDIFIED SOLUTION CONTAINING 2-12% BY WEIGHT HYDROGEN PEROXIDE, ABOUT 0.45-5.5 GRAMS PER LITER HYDROGEN ION; AND HAVING INCORPORATED THEREIN A CATALYTIC AMOUNT OF AN ADDITIVE CONTAINING (A) A MEMBER SELECTED FROM THE GROUP CONSISTING OF PHENACETIN, SULFATHIAZOLE, SILVER IONS, AND MIXTURES THEREOF, AND (B) AT LEAST 40 PARTS PER MILLION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF SATURATED DIBASIC ACIDS OF 4 TO 12 CARBON ATOMS AND HYDROXY AND CARBOXYL SUBSTITUTED SATURATED DIBASIC ACIDS OF 4 TO 12 CARBON ATOMS AND MIXTURES THEREOF, PROVIDED AT LEAST ONE CARBON ATOM ADJACENT A TERMINAL DIBASIC ACID CARBOXYL GROUP IS FREE OF SAID HYDROXY AND CARBOXYL SUBSTITUENTS, SAID SOLUTION BEING REGULATED AT A TEMPERATURE BETWEEN ABOUT 40-65*C.
References Cited (Backward Citations)
US2318559A
Cited
US2382865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |