US2649903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forehearth burner block
Assignee: Emhart Manufacturing Co
•
Filing: 1949-05-17
•
Granted: 1953-08-25
•
Expires: 1969-05-17
Abstract
No abstract record available.
Inventors
- 👤 Alan W Russell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:19
CPC Classifications
C; C03; C03B; C03B7/00; C03B7/02; C03B7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US339876A
Cited
US1741584A
Cited
GB437351A
Cited
US2278486A
Cited
US2144973A
Cited
US2313698A
Cited
US2511676A
Cited
US2422481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |