US2720487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Galvanic plating of hardened copper
Assignee: Individual
•
Filing: 1954-12-09
•
Granted: 1955-10-11
•
Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Meth Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:55
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/54
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
118 words
THE METHOD OF MAKING A MIRROR WHICH CONSISTS IN SUPPORTING A TRANSPARENT PLATE ON A RACK, IN APPLYING SILVERING SOLUTIONS THERETO WHEREBY THE PLATE IS SILVER COATED, IN IMMEDIATELY WATER RINSING SAID COATING, AND WHILE THE COATING IS STILL WET FROM RINSE WATER IMMEDIATELY APPLYING THERETO A SPRAY OF 6 TO 40 OUNCES OF COPPER SULPHATE AND 1/4 TO 2 OUNCES OF PHOSPHORIC ACID PER GALLON OF WATER AND SIMULTANEOUSLY APPLYING THERETO TO A MIXTURE COMPOSED OF 1 TO 6 OUNCES OF FINELY DIVIDED METAL DUST PER GALLON OF WATER, SAID METALLIC DUST BEING HOMOGENEOUSLY SUSPENDED IN THE WATER, SAID METALLIC DUST BEING SELECTED FROM THE GROUP OF METALS CONSISTING OF ZINC, IRON, CADMIUM, NICKEL, COBALT AND CHROMIUM.
References Cited (Backward Citations)
US242338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |