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US1238394A
Expired / Lapsed
US
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Rotary furnace structure.
Assignee: COMMERCIAL RESEARCH Co
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Filing: 1913-06-18
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Granted: 1917-08-28
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Expires: 1933-06-18
Abstract
No abstract record available.
Inventors
- 👤 Byron E Eldred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:14
CPC Classifications
F; F27; F27B; F27B7/00
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) | 1920-08-27 | 1921-02-26 | 1921-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-08-27 | 1925-02-26 | 1925-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-08-27 | 1929-02-26 | 1929-08-28 | $7700.00 | Window Closed / Lapsed |