US2953842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making tabbed heater
Assignee: GTE Sylvania Inc
•
Filing: 1954-06-28
•
Granted: 1960-09-27
•
Expires: 1974-06-28
Abstract
No abstract record available.
Inventors
- 👤 Charles E Holtz
- 👤 Henry W Roeber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:52
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/08; H01J9/10; B; B21; B21C; B21C47/00; B21C47/24; B21C47/245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49139; Y10T29/4914; Y10T29/49142; Y10T29/49174; Y10T29/49181; Y10T29/49185; Y10T29/49204; Y10T29/49208; Y10T29/49218
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |