US3573948A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of making an image plane plate
Assignee: PPG Industries Inc
•
Filing: 1968-03-12
•
Granted: 1971-04-06
•
Expires: 1988-03-12
Abstract
Abstract THE INVENTION COMPRISES IMPROVEMENTS IN MAKING IMAGE-PLANE PLATES OF GLASS STAINED ON ONE SURFACE THEREOF, IN ACCORDANCE WITH WHICH IMPROVED RESOLUTION AND/OR THE ADVANTAGES ASSOCIATED WITH HAVING A PLANAR PLATE SURFACE ARE OBTAINED BY USING THE SCREENING ACTION OF TIN OXIDE, WHICH PREVENTS METAL STAINING OF THE GLASS.
Inventors
- 👤 Milton S Tarnopol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:23
CPC Classifications
G; G03; G03F; G03F1/00; G03F1/54; G03F1/58; H; H05; H05K; H05K3/00; H05K3/0002; H05K2203/00; H05K2203/05; H05K2203/0548; H05K2203/056
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |