Patent US2547708A successfully refreshed from Google Patents.
US2547708A
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Waste flushing mechanism, including a backflow preventer
Assignee: LOCKLEY MACHINE Co
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Filing: 1946-09-21
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Granted: 1951-04-03
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Expires: 1966-09-21
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Kreiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:19
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/26; E03C1/266; E03C1/2665; Y; Y10; Y10S; Y10S4/00; Y10S4/04; Y10T; Y10T137/00; Y10T137/3149; Y10T137/3185; Y10T137/3222; Y10T137/3258; Y10T137/3294; Y10T137/3331
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1769836A
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US2044443A
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US1960144A
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US2056807A
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US2117389A
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US2033467A
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US2103118A
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US2344150A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |