US2709644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating fluorescent lamp bulbs
Assignee: Westinghouse Electric Corp
•
Filing: 1951-02-27
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Granted: 1955-05-31
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Expires: 1971-02-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel S Gustin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:42
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; C; C09; C09K; C09K11/00; C09K11/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1791066A
Cited
US2175076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |