US755320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating air.
Assignee: Individual
•
Filing: 1902-06-13
•
Granted: 1904-03-22
•
Expires: 1922-06-13
Abstract
No abstract record available.
Inventors
- 👤 Walter K Seelye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:17
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0423
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) | 1907-03-22 | 1907-09-21 | 1908-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1911-03-22 | 1911-09-21 | 1912-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1915-03-22 | 1915-09-21 | 1916-03-22 | $7700.00 | Window Closed / Lapsed |