US2967113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating method
Assignee: General Electric Co
•
Filing: 1957-11-18
•
Granted: 1961-01-03
•
Expires: 1977-11-18
Abstract
No abstract record available.
Inventors
- 👤 Herman A Liebhafsky
- 👤 Arthur M Bueche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
THE METHOD OF COATING THE ILNTERIOR SURFACE OF A GLASS ELECTRIC LAMP BULB HAVING AN OPENING THEREIN WITH A LIGHT-DIFFUSING COATING, WHICH METHOD COMPRISES BUBBLING A STEAM OF HYDROGEN AT A PRESELECTED FLOW RATE THROUGH LIQUID SILICON TETRACHLORIDE MAINTAINED AT A PRESELECTED TEMPERATURE, WHEREBY A MIXTURE OF HYDROGEN AND SILICON TETRACHLORIDE VAPOR IS FORMED, SAID PRESELECTED HYDROGEN FLOW RATE AND SAID PRESELECTED SILICON TETRACHLORIDE TEMPERATURE BEING SELECTED SO AS TO PROVIDE A PREDETERMINED RATIO OF HYDROGEN TO SILICON TETRACHLORIDE IN
Claim 2
Independent Claim
80 words
THE METHOD OF COATING THE ILNTERIOR SURFACE OF A GLASS ELECTRIC LAMP BULB HAVING AN OPENING THEREIN WITH A LIGHT-DIFFUSING COATING, WHICH METHOD COMPRISES BUBBLING A STEAM OF HYDROGEN AT A PRESELECTED FLOW RATE THROUGH LIQUID SILICON TETRACHLORIDE MAINTAINED AT A PRESELECTED TEMPERATURE, WHEREBY A MIXTURE OF HYDROGEN AND SILICON TETRACHLORIDE VAPOR IS FORMED, SAID PRESELECTED HYDROGEN FLOW RATE AND SAID PRESELECTED SILICON TETRACHLORIDE TEMPERATURE BEING SELECTED SO AS TO PROVIDE A PREDETERMINED RATIO OF HYDROGEN TO SILICON TETRACHLORIDE IN
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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) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |