Patent US2216724A successfully refreshed from Google Patents.
US2216724A
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US
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Indication and control apparatus
Assignee: Baker Petrolite LLC
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Filing: 1937-05-11
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Granted: 1940-10-08
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Expires: 1957-05-11
Abstract
No abstract record available.
Inventors
- 👤 Harold C Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:18
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10S; Y10S55/00; Y10S55/34; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3006; Y10T137/3021; Y10T137/304; Y10T137/3052
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) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |