US2677070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated grid tube
Assignee: Individual
•
Filing: 1950-05-04
•
Granted: 1954-04-27
•
Expires: 1970-05-04
Abstract
No abstract record available.
Inventors
- 👤 William C Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:21
CPC Classifications
H; H01; H01J; H01J19/00; H01J17/00; H01J17/02; H01J17/04; H01J17/12; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019; H01J2893/0022; H01J2893/0023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1601066A
Cited
FR635098A
Cited
US2079884A
Cited
US2242042A
Cited
US2365608A
Cited
US2398012A
Cited
US2308345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-26 | 1957-10-26 | 1958-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-26 | 1961-10-26 | 1962-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-26 | 1965-10-26 | 1966-04-27 | $7700.00 | Window Closed / Lapsed |