US3408476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting failure of electrical heating elements
Assignee: Hoover Universal Inc
•
Filing: 1966-03-21
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Granted: 1968-10-29
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Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Buddy D Wahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:31
CPC Classifications
B; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B27; B27D; B27D3/00; B27D3/04; B27N; B27N3/00; B27N3/08; B27N3/24; B29; B29C; B29C43/00; H; H05; H05B; H05B3/00; H05B3/0014; H05B3/0019
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2450399A
Cited
US3148269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |