US2446059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas heater
Assignee: Peabody Engineering Corp
•
Filing: 1944-10-05
•
Granted: 1948-07-27
•
Expires: 1964-10-05
Abstract
No abstract record available.
Inventors
- 👤 Eric G Peterson
- 👤 David P Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:21
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/02; F23R3/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2097255A
Cited
US1758214A
Cited
US2000733A
Cited
US2123444A
Cited
US2164954A
Cited
US2206826A
Cited
US2268464A
Cited
US2340120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-27 | 1952-01-26 | 1952-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-27 | 1956-01-26 | 1956-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-27 | 1960-01-26 | 1960-07-27 | $7700.00 | Window Closed / Lapsed |