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US2903586A
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US
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Tapered defining slot
Assignee: Individual
•
Filing: 1949-07-13
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Granted: 1959-09-08
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Expires: 1969-07-13
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Pressey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:33
CPC Classifications
H; H01; H01J; H01J27/00; H01J27/02; H01J27/08; H01J27/14; H01J49/00; H01J49/02; H01J49/10; H01J49/12; H01J49/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2387786A
Cited
US2373151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |