US2471822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Current control apparatus
Assignee: Lindberg Engineering Co
•
Filing: 1945-04-11
•
Granted: 1949-05-31
•
Expires: 1965-04-11
Abstract
No abstract record available.
Inventors
- 👤 Karl A Lang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:21
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1824577A
Cited
US1965439A
Cited
US2057520A
Cited
US2149092A
Cited
US2395515A
Cited
US2405837A
Cited
US2426937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |