US2473235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Follow-up control system
Assignee: General Electric Co
•
Filing: 1944-04-15
•
Granted: 1949-06-14
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Expires: 1964-04-15
Abstract
No abstract record available.
Inventors
- 👤 Ernst F W Alexanderson
- 👤 Martin A Edwards
- 👤 Gerald A Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:58
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1703317A
Cited
US1800328A
Cited
GB350955A
Cited
FR683021A
Cited
GB371517A
Cited
US2071424A
Cited
US2344352A
Cited
US2425433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |