US3255773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ice-free valve
Assignee: Whittaker Corp
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Filing: 1963-10-28
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Granted: 1966-06-14
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Expires: 1983-10-28
Abstract
No abstract record available.
Inventors
- 👤 Malcolm M Mcqueen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:14
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/18; F16K31/34; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4273; Y10T137/428; Y10T137/7287; Y10T137/7358; Y10T137/7361; Y10T137/7368; Y10T137/7371; Y10T137/7374; Y10T137/7381; Y10T137/7423; Y10T137/7426; Y10T137/7436; Y10T137/7439; Y10T137/7465; Y10T137/7722; Y10T137/7738
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
IN A VALVE ASSEMBLY FOR CONTOLLING THE FLOW OF LIQUID INTO A TANK FROM A SOURCE, THE COMBINATION OF: A VALVE HAVING AN INLET PORT CONNECTED TO THE SOURCE AND AN OUTLET PORT IN COMMUNICATION WITH THE TANK; A FLOAT IN THE TANK OPERATIVELY CONNECTED TO THE VALVE TO CLOSE THE VALVE IN RESPONSE TO RISE OF THE LIQUID IN THE TANK TO A GIVEN LEVEL; AND MEANS TO LOWER THE FLOAT RELATIVE TO THE LEVEL OF THE LIQUID IN THE TANK IN RESPOSE TO CLOSING OF THE VALVE THEREBY TO DELAY THE RESPONSE OF THE FLOAT TO SUBSEQUENT LOWERING OF THE LIQUID LEVEL IN THE TANK.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |