Patent US2170409A successfully refreshed from Google Patents.
US2170409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stove oven
Assignee: Johns Manville Corp
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Filing: 1936-06-01
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Granted: 1939-08-22
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Expires: 1956-06-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W Hoffman
- 👤 Otto F Juenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:54
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/34
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) | 1942-08-21 | 1943-02-20 | 1943-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-08-21 | 1947-02-20 | 1947-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-08-21 | 1951-02-20 | 1951-08-22 | $7700.00 | Window Closed / Lapsed |