US2521588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the heat-treatment of solid material
Assignee: Individual
•
Filing: 1946-07-15
•
Granted: 1950-09-05
•
Expires: 1966-07-15
Abstract
No abstract record available.
Inventors
- 👤 Lintz Mark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US159014A
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DE425316C
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US1773984A
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US1763538A
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US1801467A
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US2202498A
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US2451024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-04 | 1954-03-06 | 1954-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-04 | 1958-03-06 | 1958-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-04 | 1962-03-06 | 1962-09-05 | $7700.00 | Window Closed / Lapsed |