US2548983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated temperature control system
Assignee: Productive Inventions Inc
•
Filing: 1946-11-12
•
Granted: 1951-04-17
•
Expires: 1966-11-12
Abstract
No abstract record available.
Inventors
- 👤 Charles W Klug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/275; G05D23/1927; G05D23/193; G05D23/1931
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1783904A
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US1885053A
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US1937610A
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US2070175A
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US2159342A
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US2216246A
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US2302603A
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CH219187A
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US2510481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |