US2617371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical draft inducer for combustion apparatus, including provisions for relieving back drafts
Assignee: Perfection Stove Co
•
Filing: 1947-09-03
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Granted: 1952-11-11
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Expires: 1967-09-03
Abstract
No abstract record available.
Inventors
- 👤 Resek Marc
- 👤 Joseph R Kirkpatrick
- 👤 David L Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:06
CPC Classifications
F; F23; F23L; F23L17/00; F23L17/005; F24; F24C; F24C15/00; F24C15/001
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1182863A
Cited
US1342592A
Cited
US1297871A
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US1973997A
Cited
US2349668A
Cited
FR874246A
Cited
US2348950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |