Patent US3855091A successfully refreshed from Google Patents.
Patent US6032128A successfully refreshed from Google Patents.
Patent US2047579A successfully refreshed from Google Patents.
US2047579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermostatic stoker control
Assignee: MID CONTINENT INVEST Co
•
Filing: 1933-08-31
•
Granted: 1936-07-14
•
Expires: 1953-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter M Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:11
CPC Classifications
F; F23; F23K; F23K3/00; F23K3/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1939-07-14 | 1940-01-13 | 1940-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-07-14 | 1944-01-13 | 1944-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-07-14 | 1948-01-13 | 1948-07-14 | $7700.00 | Window Closed / Lapsed |