US2572055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron space discharge device
Assignee: Sonotone Corp
•
Filing: 1949-01-26
•
Granted: 1951-10-23
•
Expires: 1969-01-26
Abstract
No abstract record available.
Inventors
- 👤 Walter W Saldarini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:38
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2355083A
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US2402797A
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US2396170A
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US2443706A
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US2464241A
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US2433410A
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US2486829A
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US2464272A
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US2459861A
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US2476940A
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US2487592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-22 | 1955-04-23 | 1955-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-22 | 1959-04-23 | 1959-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-22 | 1963-04-23 | 1963-10-23 | $7700.00 | Window Closed / Lapsed |