Patent US1842525A successfully refreshed from Google Patents.
US1842525A
Expired / Lapsed
US
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Glow lamp
Assignee: Heintz & Kaufman Ltd
•
Filing: 1930-05-06
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Granted: 1932-01-26
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Expires: 1950-05-06
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Heintz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:29
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; G; G09; G09F; G09F13/00; G09F13/28; H01J61/00; H01J61/64; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0067; Y; Y10; Y10T; Y10T403/00; Y10T403/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-01-25 | 1935-07-27 | 1936-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-01-25 | 1939-07-27 | 1940-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-01-25 | 1943-07-27 | 1944-01-26 | $7700.00 | Window Closed / Lapsed |