US1365790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for recovering heat from driers
Assignee: BF Sturtevant Co
•
Filing: 1918-03-07
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Granted: 1921-01-18
•
Expires: 1938-03-07
Abstract
No abstract record available.
Inventors
- 👤 John O Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:21
CPC Classifications
D; D21; D21F; D21F5/00; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S261/00; Y10S261/03; Y10S261/34; Y10S261/43
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) | 1924-01-18 | 1924-07-19 | 1925-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-01-18 | 1928-07-19 | 1929-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-01-18 | 1932-07-19 | 1933-01-18 | $7700.00 | Window Closed / Lapsed |