US2585552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory curtain
Assignee: MH Detrick Co
•
Filing: 1947-09-02
•
Granted: 1952-02-12
•
Expires: 1967-09-02
Abstract
No abstract record available.
Inventors
- 👤 Louis H Hosbein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:59
CPC Classifications
F; F27; F27D; F27D99/00; F27D99/007; F27D1/00; F27D1/04; F27D1/0003; F27D1/0023; F27D1/02; F27D1/021; F27D1/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US991896A
Cited
US992994A
Cited
US1457443A
Cited
US1367497A
Cited
US1585003A
Cited
US1569923A
Cited
US1738580A
Cited
US1677002A
Cited
US2295352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |