Patent US3453477A successfully refreshed from Google Patents.
US3453477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina-ceramic sodium vapor lamp
Assignee: General Electric Co
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Filing: 1967-02-16
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Granted: 1969-07-01
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Expires: 1987-02-16
Abstract
No abstract record available.
Inventors
- 👤 Rodney E Hanneman
- 👤 Paul J Jorgensen
- 👤 Dimitrios M Speros
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:08
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/82; H01J61/825; H01J61/02; H01J61/12; H01J61/18; H01J61/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3248590A
Cited
US3384798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-30 | 1972-12-30 | 1973-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-30 | 1976-12-30 | 1977-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-30 | 1980-12-30 | 1981-07-01 | $7700.00 | Window Closed / Lapsed |