US3525013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic ion source including plurality of electron guns
Assignee: International Business Machines Corp
•
Filing: 1968-07-26
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Granted: 1970-08-18
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Expires: 1988-07-26
Abstract
No abstract record available.
Inventors
- 👤 Jay C Pelton Jr
- 👤 Richard C Senger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:12
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/221; H; H01; H01J; H01J27/00; H01J27/02; H01J27/20; H01J27/22; H01J37/00; H01J37/30; H01J37/305; H01J37/3053
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |