Patent US2019515A successfully refreshed from Google Patents.
US2019515A
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US
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Hydrant drain valve
Assignee: Waterous Co
•
Filing: 1931-12-31
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Granted: 1935-11-05
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Expires: 1951-12-31
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Waterous
- 👤 Ralph R Boyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:37
CPC Classifications
E; E03; E03B; E03B9/00; E03B9/02; E03B9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/5327; Y10T137/5497; Y10T137/5503; Y10T137/5532; Y10T137/8593; Y10T137/87169
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) | 1938-11-04 | 1939-05-06 | 1939-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-11-04 | 1943-05-06 | 1943-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-11-04 | 1947-05-06 | 1947-11-05 | $7700.00 | Window Closed / Lapsed |