US2661014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic blow-down valve
Assignee: Houseman and Thompson Ltd
•
Filing: 1950-05-23
•
Granted: 1953-12-01
•
Expires: 1970-05-23
Abstract
No abstract record available.
Inventors
- 👤 Hollingbery William Brankley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:10
CPC Classifications
F; F01; F01B; F01B25/00; F01B2250/00; F01B2250/004; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/4336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US41790A
Cited
US1341319A
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US1995885A
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US1607363A
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US1980752A
Cited
US2218446A
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US2466946A
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US2448816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |