US3040734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoke and draft control system for a furnace
Assignee: Individual
•
Filing: 1957-01-28
•
Granted: 1962-06-26
•
Expires: 1977-01-28
Abstract
No abstract record available.
Inventors
- 👤 Field Amy
- 👤 National Bank And Trust C City
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:28
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/001; F24C15/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2031314A
Cited
US1263833A
Cited
GB423724A
Cited
US2647477A
Cited
US2755794A
Cited
US2764972A
Cited
US2713301A
Cited
US2742846A
Cited
US2818060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-25 | 1965-12-25 | 1966-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-25 | 1969-12-25 | 1970-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-25 | 1973-12-25 | 1974-06-26 | $7700.00 | Window Closed / Lapsed |