US3687718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica surface treatment
Assignee: Sprague Electric Co
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Filing: 1969-11-28
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Granted: 1972-08-29
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Expires: 1989-11-28
Abstract
Abstract THE METHOD CONCERNS THE PREPARATION OF A SILICA SURFACE OF AN ELECTRICAL DEVICE FOR RECEIPT OF AN ADHERENT PHOTORESIST COATING. IT INVOLVES SUBJECTING THE DEVICE TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO REMOVE FROM THE SILICA SURFACE ALL ADSORBED H2O. THEREAFTER, THE SURFACE IS CONTACTED WITH AN ORGANOCHLOROSILANE IN THE VAPOR STATE.
Inventors
- 👤 Richard J Morrison
- 👤 Sidney D Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:50
CPC Classifications
H; H10; H10P; H10P95/00; G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/11; Y; Y10; Y10S; Y10S430/00; Y10S430/136
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |