Patent JPS447728Y1 successfully refreshed from Google Patents.
US2592899A
Expired / Lapsed
US
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Burner equipment for rotary driers for aggregates
Assignee: Individual
•
Filing: 1949-06-11
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Granted: 1952-04-15
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Expires: 1969-06-11
Abstract
No abstract record available.
Inventors
- 👤 Robert C Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:11
CPC Classifications
F; F23; F23C; F23C99/00; E; E01; E01C; E01C19/00; E01C19/02; E01C19/05; E04; E04B; E04B1/00; E04B1/62; E04B1/70; E04B1/7015; F23D; F23D14/00; F23C2700/00; F23C2700/02; F23C2700/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US397593A
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US2065566A
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US2144971A
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US2293550A
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US2370897A
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US2360167A
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US2529873A
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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) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |