US2451629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional hot-air heater
Assignee: Stewart Warner Corp
•
Filing: 1943-06-11
•
Granted: 1948-10-19
•
Expires: 1963-06-11
Abstract
No abstract record available.
Inventors
- 👤 Mccollum Thelma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:45
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/06; B64D13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US414806A
Cited
US604823A
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GB188818516A
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US1524520A
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US1734274A
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US2016164A
Cited
US2160264A
Cited
CH207911A
Cited
US2369995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |