US3496399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion gauge with collector plates anf anodes perpendicular to each other
Assignee: Edwards High Vacuum International Ltd
•
Filing: 1967-12-11
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Granted: 1970-02-17
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Expires: 1987-12-11
Abstract
No abstract record available.
Inventors
- 👤 John Doble Buckingham
- 👤 Thomas Chapman
- 👤 John Stuart Cleaver
- 👤 Peter Neville Thorne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:20
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/14; H01J41/02; H01J41/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2836790A
Cited
US2820946A
Cited
US3193724A
Cited
US3254256A
Cited
US3306112A
Cited
US3394286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |