Patent US4009947A successfully refreshed from Google Patents.
US4009947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflecting mirror
Assignee: Tochigi Canon Co Inc
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Filing: 1975-10-03
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Granted: 1977-03-01
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Expires: 1995-10-03
Abstract
Abstract A reflecting mirror which is composed of a reflecting silver layer formed on a surface of a glass base body and a protective layer being made of alloy consisting of copper and tin being formed on said reflecting silver layer. Since the reflecting layer is protected by a protective layer, this reflecting mirror has corrosion resistance.
Inventors
- 👤 Keiziro Nishida
- 👤 Susumu Itoh
- 👤 Kathuhiro Konno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:16
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/08; G02B5/0808; C; C03; C03C; C03C17/00; C03C17/34; C03C17/36; C03C17/40; G02B1/105; G02B1/00; G02B1/10; G02B1/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
57 words
A reflecting mirror comprising a glass base body, a reflecting silver layer formed on the surface of said glass base body, and a protective layer alloy composed of 30 to 70 percent by weight copper and 70 to 30 percent by weight tin being formed on the surface of said reflecting layer opposite to said glass body.
Claim 2
Dependent Claim
57 words
A reflecting mirror comprising a glass base body, a reflecting silver layer formed on the surface of said glass base body, and a protective layer alloy composed of 30 to 70 percent by weight copper and 70 to 30 percent by weight tin being formed on the surface of said reflecting layer opposite to said glass body.
Claim 3
Dependent Claim
28 words
The reflecting mirror described in claim 1, which has further a coated layer of epoxy resin on the surface of said protective layer opposite to said reflecting layer.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |