US1703656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Furnace element and process of maintaining the same
Assignee: Individual
•
Filing: 1925-04-06
•
Granted: 1929-02-26
•
Expires: 1945-04-06
Abstract
No abstract record available.
Inventors
- 👤 Anson G Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:58
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/02; F27D1/021; F27D1/16; F27D1/14; F27D1/141; F27D1/18
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) | 1932-02-26 | 1932-08-27 | 1933-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-02-26 | 1936-08-27 | 1937-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-02-26 | 1940-08-27 | 1941-02-26 | $7700.00 | Window Closed / Lapsed |