US2453792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain cock
Assignee: Weatherhead Co
•
Filing: 1944-05-15
•
Granted: 1948-11-16
•
Expires: 1964-05-15
Abstract
No abstract record available.
Inventors
- 👤 George H Hufferd
- 👤 Norbert C Beerli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:21
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US555300A
Cited
US1040266A
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US809789A
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US1274867A
Cited
DE348031C
Cited
US1525517A
Cited
FR693344A
Cited
GB490680A
Cited
US2167321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |