US1375664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot-air generator
Assignee: Individual
•
Filing: 1921-01-31
•
Granted: 1921-04-26
•
Expires: 1941-01-31
Abstract
No abstract record available.
Inventors
- 👤 Henry S Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:35
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0488; Y; Y02; Y02B; Y02B30/00
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) | 1924-04-25 | 1924-10-25 | 1925-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-04-25 | 1928-10-25 | 1929-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-04-25 | 1932-10-25 | 1933-04-26 | $7700.00 | Window Closed / Lapsed |