US3418520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intensity control system for a particle beam device
Assignee: International Business Machines Corp
•
Filing: 1966-12-21
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Granted: 1968-12-24
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Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Barber Robert Russell
- 👤 Loeffler Karl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:17
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/304; G; G11; G11B; G11B7/00; G11B7/08; G11B7/09; G11B7/0908; G11B7/0917; G11C; G11C13/00; G11C13/04; G11C13/048; H01J29/00; H01J29/46; H01J29/52; H01J29/82; H01J37/02; H01J37/04; H01J37/09; H01J37/21; H01J37/244
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2556455A
Cited
US2627589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |