Patent US2459068A successfully refreshed from Google Patents.
Patent US2473347A successfully refreshed from Google Patents.
US2473347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air directing means in gun type burners
Assignee: Cleaver Brooks Co
•
Filing: 1947-12-24
•
Granted: 1949-06-14
•
Expires: 1967-12-24
Abstract
No abstract record available.
Inventors
- 👤 William L Sanborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:08
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/001
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1490281A
Cited
US857096A
Cited
US836219A
Cited
US1618808A
Cited
US1795454A
Cited
US1762982A
Cited
US1959864A
Cited
US1910893A
Cited
US1893902A
Cited
US1990088A
Cited
US2120387A
Cited
US2096765A
Cited
US2098455A
Cited
US2117512A
Cited
US2156121A
Cited
US2221519A
Cited
US2206553A
Cited
US2262525A
Cited
US2284708A
Cited
US2249482A
Cited
US2311404A
Cited
US2292664A
Cited
US2335188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |