US2707991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treating a fluid substance
Assignee: Rosenblad Corp
•
Filing: 1949-12-22
•
Granted: 1955-05-10
•
Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Carl J Lockman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:49
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/0092
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US936760A
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US1005600A
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US1582066A
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US1582067A
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US2032182A
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US2032087A
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US2012668A
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US2262519A
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US2490750A
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US2488598A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |