US2607876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heating device
Assignee: Individual
•
Filing: 1949-10-31
•
Granted: 1952-08-19
•
Expires: 1969-10-31
Abstract
No abstract record available.
Inventors
- 👤 Richard L Bergen
- 👤 William B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:06
CPC Classifications
B; B01; B01L; B01L7/00; A; A47; A47J; A47J36/00; A47J36/24; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49801
Claims Analysis
Total Claims: 0
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US2478267A
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US2419848A
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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) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |