US2558626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable grate structure and ash remover
Assignee: Individual
•
Filing: 1945-12-29
•
Granted: 1951-06-26
•
Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 William F Pfau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
F; F23; F23J; F23J1/00; F23J1/02; F23H; F23H15/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1939177A
Cited
USRE17925E
Cited
USRE18006E
Cited
US2243962A
Cited
US598835A
Cited
US920640A
Cited
US1109451A
Cited
US1709902A
Cited
US1826106A
Cited
US1819555A
Cited
US2069940A
Cited
US1992149A
Cited
DE619081C
Cited
DE603638C
Cited
US2100937A
Cited
US2248206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |