US2443658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectifier system
Assignee: Linde Air Products Co
•
Filing: 1943-09-09
•
Granted: 1948-06-22
•
Expires: 1963-09-09
Abstract
No abstract record available.
Inventors
- 👤 John A Kratz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:24
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/06; B23K9/073; B23K9/0731
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1654937A
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US1893772A
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US1943088A
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US2119130A
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US2236015A
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US2232694A
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US2260570A
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US2282522A
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US2348259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |