US2776543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step-modulated control system for air conditioning apparatus
Assignee: General Electric Co
•
Filing: 1954-05-10
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Granted: 1957-01-08
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Francis R Eilenberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/022; F25B13/00; F25B2313/00; F25B2313/027; F25B2313/02732; F25B2400/00; F25B2400/07; F25B2400/075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2071178A
Cited
US2215327A
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US2221688A
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US2300560A
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US2308555A
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US2335071A
Cited
US2470996A
Cited
US2458683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |