US2621997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp coating
Assignee: Continental Electric Co
•
Filing: 1947-09-24
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Granted: 1952-12-16
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Expires: 1967-09-24
Abstract
No abstract record available.
Inventors
- 👤 Jr John J Benes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:18
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/02; C09K11/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS OF TREATING LAMPS HAVING A COATING OF FLUORESCENT MATERIAL ON THE INNER WALL THEREOF, COMPRISING APPLYING A SOLUTION OF ETHYL SILICATE, ACETONE AND HYDROCHLORIC ACID AS A COATING OVER THE FLUORESCENT COATING, AND HEATING SAID SOLUTION SUFFICIENTLY TO FORM A SILICA PROTECTIVE COATING OVER THE FLUORESCENT MATERIAL.
Claim 2
Dependent Claim
49 words
A PROCESS OF TREATING LAMPS HAVING A COATING OF FLUORESCENT MATERIAL ON THE INNER WALL THEREOF, COMPRISING APPLYING A SOLUTION OF ETHYL SILICATE, ACETONE AND HYDROCHLORIC ACID AS A COATING OVER THE FLUORESCENT COATING, AND HEATING SAID SOLUTION SUFFICIENTLY TO FORM A SILICA PROTECTIVE COATING OVER THE FLUORESCENT MATERIAL.
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) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |