US2444899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blowpipe apparatus for thermochemically removing metal
Assignee: Linde Air Products Co
•
Filing: 1943-04-21
•
Granted: 1948-07-06
•
Expires: 1963-04-21
Abstract
No abstract record available.
Inventors
- 👤 Meincke Edward
- 👤 Joseph M Elsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:15
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/38; B; B23; B23K; B23K7/00; B23K7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |