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US2620786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-heating furnace
Assignee: Individual
•
Filing: 1950-05-26
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Granted: 1952-12-09
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Expires: 1970-05-26
Abstract
No abstract record available.
Inventors
- 👤 Moritz L Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:27
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/02; F24D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US91560A
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US100281A
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US639571A
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US759318A
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US1600725A
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US1894122A
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US2285108A
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US2376173A
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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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |