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Patent US3259779A successfully refreshed from Google Patents.
US3259779A
Expired / Lapsed
US
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Improving efficiency of infrared radiation generation by alkali metal vapor lamps and prolonging their useful lives
Assignee: Philips North America LLC
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Filing: 1951-11-17
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Granted: 1966-07-05
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Expires: 1971-11-17
Abstract
No abstract record available.
Inventors
- 👤 Norman C Beese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:56
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/30; H01J61/302
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1830312A
Cited
US1984426A
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US2042261A
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US2056926A
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US2114536A
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US2018815A
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US2053501A
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US2104073A
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US2116689A
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US2562887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |