Patent US3851460A successfully refreshed from Google Patents.
US3851460A
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US
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Watch time display illumination
Assignee: Ervin Piquerez SA
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Filing: 1973-08-09
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Granted: 1974-12-03
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Expires: 1993-08-09
Abstract
Abstract A watch includes a transparency forming a watch glass, dial or case bottom carrying a luminescent material and having a metallized surface which reflects light from the luminescent material towards a time display zone.
Inventors
- 👤 P Piquerez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/30; G04B19/32; G04G; G04G9/00; G04G9/0023; G04G9/0029; G04G9/0035; G04G9/0041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A watch comprising a time display zone, a transparency forming a watch glass, dial or case bottom, a luminescent material supported by the transpaRency, and a metallized layer applied on said transparency to reflect light emitted by said luminescent material towards said zone.
Claim 2
Dependent Claim
43 words
A watch comprising a time display zone, a transparency forming a watch glass, dial or case bottom, a luminescent material supported by the transpaRency, and a metallized layer applied on said transparency to reflect light emitted by said luminescent material towards said zone.
Claim 3
Dependent Claim
25 words
A watch according to claim 1, comprising means defining a plurality of discrete cavities in said transparency, said luminescent material being disposed in said cavities.
Claim 4
Dependent Claim
103 words
A watch according to claim 1, in which said transparency forms a watch glass and includes an inner face disposed facing said zone, and comprising means defining a groove in said inner surface of the transparency, said groove including an edge disposed in the proximity of said zone, said metallized layer being applied on said inner surface of said transparency and on the surface of said groove and terminating in the neighborhood of said edge of said groove to leave an unmetallized portion of said surface of the transparency through which said zone is visible, said luminescent material being disposed in said groove.
Claim 5
Dependent Claim
34 words
A watch according to claim 3, in which said groove has a transverse cross-section substantially in the shape of a parabola whose axis is inclined with respect to said inner surface towards said zone.
Claim 6
Dependent Claim
37 words
A watch according to claim 4, in which said zone is rectangular, and two metallized grooves containing luminescent material are disposed in said inner surface of said transparency in the proximity of opposite sides of said zone.
References Cited (Backward Citations)
CH297901A
Cited
US3431721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |