US2616020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic temperature control
Assignee: Shell Development Co
•
Filing: 1950-03-07
•
Granted: 1952-10-28
•
Expires: 1970-03-07
Abstract
No abstract record available.
Inventors
- 👤 Charles H Fay
- 👤 Richard R Goodell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:56
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2093745A
Cited
US2086966A
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US2154862A
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US2189462A
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US2406715A
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US2556065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |