US2442437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiflame blowpipe head
Assignee: Union Carbide Corp
•
Filing: 1944-08-19
•
Granted: 1948-06-01
•
Expires: 1964-08-19
Abstract
No abstract record available.
Inventors
- 👤 James C Robbins
- 👤 Jr Thomas Mcelrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:40
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1006890A
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US1198188A
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US1286582A
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US1371309A
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US1414530A
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US1514815A
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US1441488A
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US1571004A
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GB185730A
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US2129681A
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US2337087A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-01 | 1951-12-01 | 1952-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-01 | 1955-12-01 | 1956-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-01 | 1959-12-01 | 1960-06-01 | $7700.00 | Window Closed / Lapsed |