US2903981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ash producing furnaces and ash removal apparatus for use therewith
Assignee: Individual
•
Filing: 1955-11-14
•
Granted: 1959-09-15
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 John E Brink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:42
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/1915; F23; F23J; F23J1/00; F23J2700/00; F23J2700/001; F23J2700/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2562270A
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US2579402A
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US2725834A
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US2805425A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |