US3530327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal halide discharge lamps with rare-earth metal oxide used as electrode emission material
Assignee: Philips North America LLC
•
Filing: 1968-03-11
•
Granted: 1970-09-22
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Expires: 1988-03-11
Abstract
No abstract record available.
Inventors
- 👤 Robert J Zollweg
- 👤 Dietrich F Ennulat
- 👤 Norman Slagg
- 👤 Patrick C Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:24
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0735; H01J61/0737
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2765420A
Cited
US3014156A
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US3188236A
Cited
US3349276A
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US3405303A
Cited
US3334261A
Cited
US3452238A
Cited
US3445719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |