US3813276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating a glass body
Assignee: US Philips Corp
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Filing: 1972-04-25
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Granted: 1974-05-28
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Expires: 1992-04-25
Abstract
Abstract A METHOD IN WHICH THE ELECTRICAL CONDUCTIVITY OF A GLASS IS ADJUSTED BY MEANS OF AN OXIDIZING OR REDUCING TREATMENT AND IN WHICH SEQUENTLY A LAYER IS ETCHED OFF THE GLASS SURFACE.
Inventors
- 👤 H Trap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
C; C03; C03C; C03C23/00; C03C15/00; C03C3/00; C03C3/04; C03C3/076; C03C3/083; C03C3/085; H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24
Claims Analysis
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |