Patent US2825547A successfully refreshed from Google Patents.
US2825547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muffle type furnace with movable support struts
Assignee: Electric Furnace Co
•
Filing: 1955-05-24
•
Granted: 1958-03-04
•
Expires: 1975-05-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Vaughan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:38
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/561; F; F27; F27B; F27B5/00; F27B5/04; Y; Y10; Y10S; Y10S220/00; Y10S220/918
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US916518A
Cited
US980640A
Cited
US1489626A
Cited
US1695950A
Cited
GB482659A
Cited
US2113083A
Cited
US2307915A
Cited
US2373845A
Cited
US2671655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |