US2821662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion source
Assignee: Individual
•
Filing: 1955-07-29
•
Granted: 1958-01-28
•
Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Jr William A Bell
- 👤 Leon O Love
- 👤 Willis K Prater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:13
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/10; H01J49/12; H01J49/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2563626A
Cited
US2507653A
Cited
US2719925A
Cited
US2717962A
Cited
US2717963A
Cited
US2715693A
Cited
US2715695A
Cited
US2704335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |