US2933296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing an insulated stream of hot fluid
Assignee: Individual
•
Filing: 1955-12-27
•
Granted: 1960-04-19
•
Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Carleton D Spangler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1452380A
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US1657725A
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US1657698A
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GB350051A
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US2047471A
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FR843517A
Cited
US2582888A
Cited
US2635564A
Cited
US2707444A
Cited
US2738776A
Cited
GB704901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |