US2725319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety glass heating panel
Assignee: PPG Industries Inc
•
Filing: 1952-02-23
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Granted: 1955-11-29
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Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Milton S Tarnopol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:03
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/84; H05B3/86; B; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10174; B32B17/10376; B32B17/10807; B32B17/10816; B32B17/10825; B32B17/10834; B32B17/10844; B32B17/10853; B60; B60S; B60S1/00; B60S1/02; B60S1/023; B60S1/026; H05B2203/00; H05B2203/013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN ARTICLE OF MANUFACTURE, FOR SUBSEQUENT ATTACHMENT TO A TRANSPARENT REFRACTORY SHEET, WHICH CONSISTS OF A REFRACTORY BASE HAVING A TRANSPARENT ELECTROCONDUCTIVE COATING AND A PAIR OF LATERALLY SPACED BUS BARS ON A FACE THEREOF AND A SHEET OF PLASTIC LAMINATED TO THE BASE ON THE FACE OF THE BASE CONTAINING THE TRANSPARENT ELECTROCONDUCTIVE COATING AND BUS BARS, THE EXPOSED FACE OF THE PLASTIC HAVING A PRESS POLISHED SURFACE.
Claim 2
Dependent Claim
69 words
AN ARTICLE OF MANUFACTURE, FOR SUBSEQUENT ATTACHMENT TO A TRANSPARENT REFRACTORY SHEET, WHICH CONSISTS OF A REFRACTORY BASE HAVING A TRANSPARENT ELECTROCONDUCTIVE COATING AND A PAIR OF LATERALLY SPACED BUS BARS ON A FACE THEREOF AND A SHEET OF PLASTIC LAMINATED TO THE BASE ON THE FACE OF THE BASE CONTAINING THE TRANSPARENT ELECTROCONDUCTIVE COATING AND BUS BARS, THE EXPOSED FACE OF THE PLASTIC HAVING A PRESS POLISHED SURFACE.
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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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |