US2812662A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure pulsation indicator
Assignee: Kobe Inc
•
Filing: 1950-06-03
•
Granted: 1957-11-12
•
Expires: 1970-06-03
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Coberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:18
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US517089A
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DE102203C
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GB191218801A
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FR590063A
Cited
US1939067A
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US1958009A
Cited
US2105127A
Cited
US2365015A
Cited
US2306372A
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US2354847A
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US2347903A
Cited
US2644329A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |