US1978191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative furnace
Assignee: H L DIXON Co
•
Filing: 1934-02-26
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Granted: 1934-10-23
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Expires: 1954-02-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel A Forter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:12
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/235; C03B5/237; F; F28; F28D; F28D17/00; F28D17/02; Y; Y02; Y02P; Y02P40/00; Y02P40/50
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) | 1937-10-22 | 1938-04-23 | 1938-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-10-22 | 1942-04-23 | 1942-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-10-22 | 1946-04-23 | 1946-10-23 | $7700.00 | Window Closed / Lapsed |