US2821637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light image reproduction devices
Assignee: Westinghouse Electric Corp
•
Filing: 1953-11-30
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Granted: 1958-01-28
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Expires: 1973-11-30
Abstract
No abstract record available.
Inventors
- 👤 William L Roberts
- 👤 Andrew P Kruper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:19
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/56; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |