US3908109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dome shaped switch member
Assignee: DECISION DATA Inc A CORP OF
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Filing: 1974-06-14
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Granted: 1975-09-23
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Expires: 1994-06-14
Abstract
Abstract A dome shaped element which is used as a switch member in a keyboard switch assembly consists of a hollow, geometric solid having an open circular base with a plurality of planar side walls extending from the base. The side walls are joined by an arcuate surface and arcuate feet members join segments of the arcuate surface to the adjacent side walls. The feet are bent angularly to the plane of the arcuate surface.
Inventors
- 👤 Thomas J Studebaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:08
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/26; H01H13/48; H01H2227/00; H01H2227/026
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
85 words
A dome element for use as a switch member, said dome element comprising an open circular base, a plurality of planar side walls, each of said planar side walls extending from a segment of said open circular base at equal angles thereto, an arcuate surface interconnecting said side walls and a plurality of arcuate corners angled downwardly from a tip of said arcuate surface, each of said arcuate corners interconnecting said tip of said arcuate surface with an adjacent pair of said planar side walls.
Claim 2
Dependent Claim
85 words
A dome element for use as a switch member, said dome element comprising an open circular base, a plurality of planar side walls, each of said planar side walls extending from a segment of said open circular base at equal angles thereto, an arcuate surface interconnecting said side walls and a plurality of arcuate corners angled downwardly from a tip of said arcuate surface, each of said arcuate corners interconnecting said tip of said arcuate surface with an adjacent pair of said planar side walls.
Claim 3
Dependent Claim
12 words
The dome element recited in claim 1, said arcuate surface being spherical.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |