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Patent US2329997A successfully refreshed from Google Patents.
US2329997A
Expired / Lapsed
US
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Cleanout protected water seal trap
Assignee: J A ZURN MANUFACTURING Co
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Filing: 1941-09-22
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Granted: 1943-09-21
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Expires: 1961-09-22
Abstract
No abstract record available.
Inventors
- 👤 Henry J Luff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:09
CPC Classifications
E; E03; E03C; E03C1/00; E03C1/12; E03C1/28; E03C1/284; Y; Y10; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4463; Y10T137/4576; Y10T137/4583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-09-20 | 1947-03-22 | 1947-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-09-20 | 1951-03-22 | 1951-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-09-20 | 1955-03-22 | 1955-09-21 | $7700.00 | Window Closed / Lapsed |