Patent US2327690A successfully refreshed from Google Patents.
US2327690A
Expired / Lapsed
US
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Control apparatus
Assignee: Hubbard and Co
•
Filing: 1940-11-19
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Granted: 1943-08-24
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Expires: 1960-11-19
Abstract
No abstract record available.
Inventors
- 👤 Harold S Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:59
CPC Classifications
F; F24; F24C; F24C3/00; F24C3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-08-23 | 1947-02-22 | 1947-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-08-23 | 1951-02-22 | 1951-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-08-23 | 1955-02-22 | 1955-08-24 | $7700.00 | Window Closed / Lapsed |