US2728871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge lamp
Assignee: GTE Sylvania Inc
•
Filing: 1954-06-09
•
Granted: 1955-12-27
•
Expires: 1974-06-09
Abstract
No abstract record available.
Inventors
- 👤 Joseph R Morin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:38
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2002551A
Cited
US1900578A
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US1914224A
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US1949276A
Cited
US2322421A
Cited
US2308350A
Cited
US2567491A
Cited
US2453118A
Cited
US2673304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |