US2742764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid ammonia flow system and valve
Assignee: Weatherhead Co
•
Filing: 1952-10-15
•
Granted: 1956-04-24
•
Expires: 1972-10-15
Abstract
No abstract record available.
Inventors
- 👤 Clair Theodore A St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A01; A01C; A01C23/00; A01C23/02; A01C23/023; A01C23/024; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2567; Y10T137/2569; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7787; Y10T137/7788; Y10T137/7793; Y10T137/7795; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A REGULATING VALVE FOR LIQUID ANHYDROUS AMMONIA COMPRISING A VALVE BODY HAVING AN INLET, A DIFFERENTIAL PRESSURE REGULATOR IN COMMUNICATION WITH SAID INLET, A PASSAGEWAY LEADING FROM SAID PRESSURE REGULATOR TO A METERING ORIFICE, A PASSAGEWAY LEADING FROM SAID METERING ORIFICE TO A SECOND PRESSURE REGULATOR, A PASSAGEWAY LEADING FROM SAID SECOND-NAMED PASSAGEWAY INTO SAID FIRST PRESSURE REGULATOR ON THAT SIDE OF THE DIAPHRAGM THEREOF
Claim 2
Dependent Claim
65 words
A REGULATING VALVE FOR LIQUID ANHYDROUS AMMONIA COMPRISING A VALVE BODY HAVING AN INLET, A DIFFERENTIAL PRESSURE REGULATOR IN COMMUNICATION WITH SAID INLET, A PASSAGEWAY LEADING FROM SAID PRESSURE REGULATOR TO A METERING ORIFICE, A PASSAGEWAY LEADING FROM SAID METERING ORIFICE TO A SECOND PRESSURE REGULATOR, A PASSAGEWAY LEADING FROM SAID SECOND-NAMED PASSAGEWAY INTO SAID FIRST PRESSURE REGULATOR ON THAT SIDE OF THE DIAPHRAGM THEREOF
References Cited (Backward Citations)
US2248222A
Cited
US2272341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |