Patent US2818159A successfully refreshed from Google Patents.
US2818159A
Expired / Lapsed
US
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Sealing head orienting apparatus
Assignee: GTE Sylvania Inc
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Filing: 1955-08-17
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Granted: 1957-12-31
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Expires: 1975-08-17
Abstract
No abstract record available.
Inventors
- 👤 Ernest E Yeo
- 👤 David P Drown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:55
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/20; H01J2893/00; H01J2893/0033; H01J2893/0037
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2109505A
Cited
US2630204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |