US2748023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for depositing copper
Assignee: Individual
•
Filing: 1954-11-16
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Granted: 1956-05-29
•
Expires: 1974-11-16
Abstract
No abstract record available.
Inventors
- 👤 Meth Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:03
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
THE METHOD OF PRODUCING A COPPER PLATED SILVERED MIRROR INCLUDING THE STEPS OF MOUNTING A TRANSPARENT PLATE ON A SUPPORTING RACK, CHEMICALLY DEPOSITING A SILVER REFLECTIVE COATING FROM A SILVER DEPOSITING SOLUTION ON SAID PLATE WHILE IN ITS MOUNTED POSITION, AND THEN WHILE THE SILVER REFLECTING SURFACE IS STILL WET WITH RINSE WATER AND THE PLATE IN PLACE ON THE RACK, SIMULTANEOUSLY INTERMINGLING AND SPRAYING ONTO SAID SURFACE A COPPER SULPHATE SOLUTION AND A SUBSTANTIALLY HOMOGENEOUS FLUID SUSPENSION OF FINELY DIVIDED CADMIUM DUST TO THEREBY DEPOSIT A COPPER PROTECTIVE LAYER, SAID DUST HAVING A FINENESS SUCH THAT SUBSTANTIALLY ALL OF IT WILL PASS THROUGH A SCREEN HAVING 300 OPENINGS PER SQUARE INCH.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |