US3137600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissolution of copper
Assignee: FMC Corp
•
Filing: 1960-09-12
•
Granted: 1964-06-16
•
Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 Paul H Margulies
- 👤 William J Tillis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:43
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/16; C23F1/18; H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
25 words
METHOD OF DISSOLVING METALLIC COPPER, COMPRISING CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT 10% TO 60% BY WEIGHT OF AMMONIUM MONOPERSULFATE.
Claim 2
Dependent Claim
25 words
METHOD OF DISSOLVING METALLIC COPPER, COMPRISING CONTACTING THE COPPER WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF ABOUT 10% TO 60% BY WEIGHT OF AMMONIUM MONOPERSULFATE.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |