US2428274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Needle flame dual control burner
Assignee: ENSIGN RIBBON BURNERS Inc
•
Filing: 1944-03-01
•
Granted: 1947-09-30
•
Expires: 1964-03-01
Abstract
No abstract record available.
Inventors
- 👤 Flynn John Harold
- 👤 William B Ensign
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:14
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/58; F23D14/583; F23D14/586; F23D14/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE526378C
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DE595514C
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US1105031A
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US1642154A
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US1704359A
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US2348011A
Cited
US2294748A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |