US2960414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing an electric lamp envelope with a non-uniform light-diffusing coating
Assignee: GTE Sylvania Inc
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Filing: 1959-02-27
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Granted: 1960-11-15
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Expires: 1979-02-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Gustin
- 👤 John K Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:38
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
THE METHOD OF TREATING AN ELECTRIC LAMP ENVELOPE PROVIDED WITH A COATING OF LIGHT-DIFFUSING MATERIAL ON THE INNER WALL THEREOF, SAID COATING BEING OF THE TYPE WHICH ADHERES MORE TENACIOUSLY WHEN STEAM IS APPLIED THERETO, SAID METHOD COMPRISING: HEATING A SELECTED PORTION OF THE LAMP ENVELOPE TO A TEMPERATURE BETWEEN ABOUT 255* F. TO ABOUT 300*F, INTRODUCING STEAM INTO THE LAMP ENVELOPE WHEREBY THE SAID COATING IS EXPOSED THERETO, THE STEAM CONDENSING ON THE COOLER PORTIONS OF THE LAMP ENVELOPE AND EFFECTING A SETTING OF THE COATING THEREON, HEATING THE LAMP ENVELOPE TO REMOVE THE MOISTURE INTRODUCED THEREIN DURING STEAMING, AND DIRECTING A STREAM OF GAS UNDER PRESSURE AGAINST THE FIRST MENTIONED HEATED SELECTED PORTION OF THE LAMP ENVELOPE WHEREBY THE COATING ON SAID SELECTED PORTION IS REMOVED THEREFROM.
Claim 2
Independent Claim
129 words
THE METHOD OF TREATING AN ELECTRIC LAMP ENVELOPE PROVIDED WITH A COATING OF LIGHT-DIFFUSING MATERIAL ON THE INNER WALL THEREOF, SAID COATING BEING OF THE TYPE WHICH ADHERES MORE TENACIOUSLY WHEN STEAM IS APPLIED THERETO, SAID METHOD COMPRISING: HEATING A SELECTED PORTION OF THE LAMP ENVELOPE TO A TEMPERATURE BETWEEN ABOUT 255* F. TO ABOUT 300*F, INTRODUCING STEAM INTO THE LAMP ENVELOPE WHEREBY THE SAID COATING IS EXPOSED THERETO, THE STEAM CONDENSING ON THE COOLER PORTIONS OF THE LAMP ENVELOPE AND EFFECTING A SETTING OF THE COATING THEREON, HEATING THE LAMP ENVELOPE TO REMOVE THE MOISTURE INTRODUCED THEREIN DURING STEAMING, AND DIRECTING A STREAM OF GAS UNDER PRESSURE AGAINST THE FIRST MENTIONED HEATED SELECTED PORTION OF THE LAMP ENVELOPE WHEREBY THE COATING ON SAID SELECTED PORTION IS REMOVED THEREFROM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |