Patent US2532421A successfully refreshed from Google Patents.
US2532421A
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US
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Line tracker control
Assignee: Linde Air Products Co
•
Filing: 1946-06-19
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Granted: 1950-12-05
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Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Rathje
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
B; B23; B23Q; B23Q35/00; B23Q35/04; B23Q35/08; B23Q35/12; B23Q35/127; B23Q35/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US729269A
Cited
US2172313A
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US2121211A
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US2089015A
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US2226677A
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US2331337A
Cited
US2225821A
Cited
US2261644A
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US2397933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |