US2608638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic dielectric heating apparatus
Assignee: Hoover Co
•
Filing: 1947-01-17
•
Granted: 1952-08-26
•
Expires: 1967-01-17
Abstract
No abstract record available.
Inventors
- 👤 George P Daiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:08
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; Y; Y10; Y10S; Y10S99/00; Y10S99/14
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) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |