US2804918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retort burner and blowtorch incorporating the same
Assignee: Hupp Corp
•
Filing: 1954-02-04
•
Granted: 1957-09-03
•
Expires: 1974-02-04
Abstract
No abstract record available.
Inventors
- 👤 David L Raymond
- 👤 Richard J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:13
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/44; F23D11/441; F23D11/443
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US857808A
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US798359A
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US1236172A
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US1421031A
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US1546038A
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CH190639A
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FR977825A
Cited
US2498362A
Cited
US2402139A
Cited
US2467450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |