US2638929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-throttling valve
Assignee: DELANY REALTY Corp
•
Filing: 1949-06-04
•
Granted: 1953-05-19
•
Expires: 1969-06-04
Abstract
No abstract record available.
Inventors
- 👤 John J Delany
- 👤 Edwin C Baisel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:28
CPC Classifications
E; E03; E03D; E03D3/00; E03D3/02; E03D3/06; E03D9/00; E03D9/14; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1839962A
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US1858420A
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US2026506A
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US2181900A
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US2205533A
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US2489932A
Cited
US2460647A
Cited
US2523864A
Cited
US2534874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |