Patent US2120158A successfully refreshed from Google Patents.
US2804690A
Expired / Lapsed
US
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Plumbing device
Assignee: Ben C Gerwick Inc
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Filing: 1954-03-15
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Granted: 1957-09-03
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Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 William J Talbot
- 👤 John B Darby
- 👤 Thomas F Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:30
CPC Classifications
E; E02; E02D; E02D23/00; E02D23/08; E02D15/00; E02D15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |