US3547100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable warming appliance for burning solid fuel
Assignee: Individual
•
Filing: 1968-01-04
•
Granted: 1970-12-15
•
Expires: 1988-01-04
Abstract
No abstract record available.
Inventors
- 👤 Yasumasa Usui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:18
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F7/03; A61F7/032; A61F7/034; A61F2007/0001; A61F2007/0018; A61F2007/0024; A61F2007/0225; A61F2007/0228
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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |