US2880351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum discharge tube
Assignee: US Philips Corp
•
Filing: 1954-02-04
•
Granted: 1959-03-31
•
Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 Warmoltz Nicolaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:00
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1832909A
Cited
US1872302A
Cited
US1955391A
Cited
US1954420A
Cited
US2427737A
Cited
US2686888A
Cited
US2749468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |