Patent US3214577A successfully refreshed from Google Patents.
US3214577A
Expired / Lapsed
US
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Illuminated dial
Assignee: Electrodynamics Inc
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Filing: 1962-09-13
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Granted: 1965-10-26
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Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Donald E Protzmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:50
CPC Classifications
G; G04; G04B; G04B19/00; G04B19/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
AN ILLUMINATABLE DIAL COMPRISING A CUP-SHAPED MEMBER OF LIGHT TRANSMITTING MATERIAL HAVING A DISPLAY FIELD FACE PORTION AND A PERIPHERAL FLANGE, SAID FLANGE HAVING A LAMP RECEIVING OPENING THEREIN, THE EDGE OF SAID FLANGE BEING STEPPED SO AS TO DEFINE INTERNALLY REFLECTING SURFACES INCLINED TRANSVERSELY OF THE FLANGE AND WITH RESPECT TO SAID FACE PORTION FOR DIRECTING LIGHT MOVING PERIPHERALLY OF SAID FACE PORTION FROM SAID OPENING TOWARD THE FACE PORTION OF SAID MEMBER, AND SAID DISPLAY FIELD FACE PORTION OF THE MEMBER BEING TAPERED IN THICKNESS INWARDLY FROM SAID FLANGE SO AS TO DISPERSE LIGHT FROM SAID FLANGE OVER SAID FACE.
Claim 2
Dependent Claim
102 words
AN ILLUMINATABLE DIAL COMPRISING A CUP-SHAPED MEMBER OF LIGHT TRANSMITTING MATERIAL HAVING A DISPLAY FIELD FACE PORTION AND A PERIPHERAL FLANGE, SAID FLANGE HAVING A LAMP RECEIVING OPENING THEREIN, THE EDGE OF SAID FLANGE BEING STEPPED SO AS TO DEFINE INTERNALLY REFLECTING SURFACES INCLINED TRANSVERSELY OF THE FLANGE AND WITH RESPECT TO SAID FACE PORTION FOR DIRECTING LIGHT MOVING PERIPHERALLY OF SAID FACE PORTION FROM SAID OPENING TOWARD THE FACE PORTION OF SAID MEMBER, AND SAID DISPLAY FIELD FACE PORTION OF THE MEMBER BEING TAPERED IN THICKNESS INWARDLY FROM SAID FLANGE SO AS TO DISPERSE LIGHT FROM SAID FLANGE OVER SAID FACE.
References Cited (Backward Citations)
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US3029334A
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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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |