US2498089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level controller
Assignee: Morton Salt Co
•
Filing: 1945-02-09
•
Granted: 1950-02-21
•
Expires: 1965-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Alfred Lippman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:08
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/54; G; G05; G05D; G05D9/00; G05D9/12; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19377; Y10T74/19414; Y10T74/19419; Y10T74/19423; Y10T74/19428; Y10T74/19437
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US885891A
Cited
US934700A
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US1397724A
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US1624294A
Cited
US1949933A
Cited
US2255126A
Cited
US2261585A
Cited
US2269800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |