US2222883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical heating unit
Assignee: Individual
•
Filing: 1938-04-29
•
Granted: 1940-11-26
•
Expires: 1958-04-29
Abstract
No abstract record available.
Inventors
- 👤 John E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:04
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/06; H01; H01M; H01M10/00; H01M10/06; H01M10/08; H01M10/10; Y; Y02; Y02E; Y02E60/00; Y02E60/10
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) | 1943-11-26 | 1944-05-27 | 1944-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-11-26 | 1948-05-27 | 1948-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-11-26 | 1952-05-27 | 1952-11-26 | $7700.00 | Window Closed / Lapsed |