Patent US3140831A successfully refreshed from Google Patents.
US3140831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trans-illuminated panels
Assignee: Individual
•
Filing: 1955-12-20
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Granted: 1964-07-14
•
Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Strange John William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:12
CPC Classifications
B; B60; B60Q; B60Q3/00; B60Q3/10; B60Q3/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
33 words
A PANEL COMPRISING: A LIGH TRANSMITTING SHEET, A TRANSLUCENT SHEET AFFIXED ON ONE SIDE THEREOF, AN ELECTRICALLY CONDUCTIVE SHEET AFFIXED ON SAID TRANSLUCENT SHEET AND AN OPAQUE COVERING ON SAID ELECTRICALLY CONDUCTIVE SHEET.
References Cited (Backward Citations)
US2587568A
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US2599710A
Cited
US2518726A
Cited
US2695354A
Cited
US2702340A
Cited
US2696550A
Cited
US2772651A
Cited
US2824954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |