US3435274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plurality of ceramic spacers for separating planar grids
Assignee: United States Department of the Army
•
Filing: 1966-04-29
•
Granted: 1969-03-25
•
Expires: 1986-04-29
Abstract
No abstract record available.
Inventors
- 👤 Harold D Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:51
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE15278E
Cited
US2455851A
Cited
US2916649A
Cited
US3082339A
Cited
US3154711A
Cited
US3359447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |