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US2772771A
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Dispersed getter elements
Assignee: MO Valve Co Ltd
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Filing: 1955-07-14
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Granted: 1956-12-04
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Expires: 1975-07-14
Abstract
No abstract record available.
Inventors
- 👤 Wheldon Robert Joseph
- 👤 Widdowson Arthur Everard
- 👤 Wilkinson Kenneth Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:40
CPC Classifications
H; H01; H01J; H01J7/00; H01J7/14; H01J7/18; H01J7/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2082268A
Cited
US2137745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |