Patent US2608169A successfully refreshed from Google Patents.
US2608169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draft head for refuse burners
Assignee: Individual
•
Filing: 1950-12-29
•
Granted: 1952-08-26
•
Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Charles H Sparks
- 👤 Frank C Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:48
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/10; F23G7/105
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US528718A
Cited
US652227A
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US1464272A
Cited
US1494039A
Cited
CH174307A
Cited
US2514657A
Cited
US2530208A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |