Patent US3579440A successfully refreshed from Google Patents.
Patent US2489244A successfully refreshed from Google Patents.
US2489244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chamber burner
Assignee: Owens Corning
•
Filing: 1944-07-27
•
Granted: 1949-11-22
•
Expires: 1964-07-27
Abstract
No abstract record available.
Inventors
- 👤 Charles J Stalego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:11
CPC Classifications
F; F23; F23C; F23C3/00; C; C03; C03B; C03B37/00; C03B37/01; C03B37/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US571076A
Cited
US1175224A
Cited
US1702642A
Cited
US2402045A
Cited
US1128175A
Cited
US1157984A
Cited
US1328446A
Cited
US1409433A
Cited
US1600712A
Cited
US1689551A
Cited
GB254966A
Cited
US1769181A
Cited
US1822518A
Cited
US1704875A
Cited
US2044511A
Cited
US2104311A
Cited
US1938982A
Cited
US2015934A
Cited
US1981976A
Cited
US2133235A
Cited
US2269459A
Cited
US2241295A
Cited
US2367119A
Cited
US2228150A
Cited
US2269528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |