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Patent US2518544A successfully refreshed from Google Patents.
US2518544A
Expired / Lapsed
US
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Multiflame heating head
Assignee: Linde Air Products Co
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Filing: 1947-11-15
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Granted: 1950-08-15
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Expires: 1967-11-15
Abstract
No abstract record available.
Inventors
- 👤 Clifford C Anthes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:22
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/71; G01N21/72; F; F23; F23D; F23D14/00; F23D14/46; F23D14/48; F23D14/52; F23D14/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |