US2798143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percolator control
Assignee: Westinghouse Electric Corp
•
Filing: 1953-03-19
•
Granted: 1957-07-02
•
Expires: 1973-03-19
Abstract
No abstract record available.
Inventors
- 👤 Edward L O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:58
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1743073A
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US2181090A
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US2175727A
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US2329116A
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US2576432A
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US2611070A
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US2698368A
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US2689290A
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US2641681A
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US2657300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |