Patent US2446388A successfully refreshed from Google Patents.
US2446388A
Expired / Lapsed
US
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Preheating furnace blast
Assignee: Brassert & Co
•
Filing: 1943-10-20
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Granted: 1948-08-03
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Expires: 1963-10-20
Abstract
No abstract record available.
Inventors
- 👤 Charles F Ramseyer
- 👤 Cornelius M Cosman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
C; C21; C21B; C21B5/00; C21B5/06; F; F28; F28D; F28D19/00; F28D19/02; C21B2100/00; C21B2100/40; C21B2100/44; C21B2100/60; C21B2100/64; C21B2100/66; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1148331A
Cited
US1203944A
Cited
GB212671A
Cited
US1614387A
Cited
US1904153A
Cited
US1823358A
Cited
US2141633A
Cited
GB525197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |