US2977244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing metallic copper
Assignee: Pilkington Group Ltd
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Filing: 1959-01-30
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Granted: 1961-03-28
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Expires: 1979-01-30
Abstract
No abstract record available.
Inventors
- 👤 Kay Solomon Elijah
- 👤 Ball Robert John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/38; C23C18/1601; C23C18/1633; C23C18/1655; C23C18/1658; C23C18/166; C23C18/1662
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
A METHOD OF DEPOSITING A PROTECTIVE LAYER OF METALLIC COPPER ON A SILVERED MIRROR, WHICH COMPRISES SEPARATELY SPRAYING AN AQUEOUS SOLUTION OF A COMPLEX CUPROUS SALT AND AN AQUEOUS ACID SOLUTION SIMULTANEOUSLY TOWARDS SILVERED SURFACE SO AS TO MIX THE TWO SPRAYED SOLUTIONS AND THEREBY DEPOSIT A LAYER OF METALLIC COPPER THEREON.
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) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |