US3552992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frosted coatings for glass
Assignee: EIDP Inc
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Filing: 1967-11-29
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Granted: 1971-01-05
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Expires: 1987-11-29
Abstract
Abstract THE PRESENT INVENTION RELATES TO A METHOD AND COMPOSITION FOR COATING GLASS SURFACES TO PRODUCE A LIGHT DIFFUSING COATING PRIMARILY FOR APPLICATION IN FROSTED LIGHT BULBS. A GLASS SURFACE IS SPRAYED OR OTHERWISE COATED WITH A COLLOIDAL SILICA AQUASOL HAVING AN ULTIMATE PARTICLE SIZE OF LESS THAN 30 MILLIMICRONS. THE GLASS SURFACE IS HELD AT A TEMPERATURE ABOUT 90* C. DURING THE COATING PROCESS.
Inventors
- 👤 James M Self
- 👤 Paul C Yates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:12
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/22; C03C17/23; H; H01; H01K; H01K1/00; H01K1/28; H01K1/32; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2218/00; C03C2218/10; C03C2218/11; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/252
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |