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US2889483A
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Assignee: GTE Sylvania Inc
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Filing: 1954-09-01
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Granted: 1959-06-02
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Expires: 1974-09-01
Abstract
No abstract record available.
Inventors
- 👤 Donald R Kerstetter
- 👤 Paul H Sassaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:10
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/30; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0019
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1612835A
Cited
US1479256A
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US1437607A
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US2250283A
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US2602145A
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US2728025A
Cited
US2777084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |