US3434500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure reducer
Assignee: Dresser Industries Inc
•
Filing: 1964-12-23
•
Granted: 1969-03-25
•
Expires: 1984-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lewis M Burrows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:51
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/0616; G05D16/0619; F; F16; F16K; F16K47/00; F16K47/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A FLUID PRESSURE REDUCING DEVICE A PAIR OF OVERLYING MEMBERS, MEANS PROVIDING AN OUTLET OPENINGIN ONE OF SAID MEMBERS, MEANS PROVIDING A FLUID INLET OPENING IN THE OTHER OF SAID MEMBERS, A RAISED ANNULAR SURFACE ON ONE OF SAID MEMBERS EXTENDING RADIALLY OF CIRCUMFERENTIALLY ABOUT SAID OUTLET OPENING AND COOPERATING TO PROVIDE FLUID FLOW RESTRICTION MEANS CONNECTING SAID INLET
Claim 2
Dependent Claim
60 words
IN A FLUID PRESSURE REDUCING DEVICE A PAIR OF OVERLYING MEMBERS, MEANS PROVIDING AN OUTLET OPENINGIN ONE OF SAID MEMBERS, MEANS PROVIDING A FLUID INLET OPENING IN THE OTHER OF SAID MEMBERS, A RAISED ANNULAR SURFACE ON ONE OF SAID MEMBERS EXTENDING RADIALLY OF CIRCUMFERENTIALLY ABOUT SAID OUTLET OPENING AND COOPERATING TO PROVIDE FLUID FLOW RESTRICTION MEANS CONNECTING SAID INLET
References Cited (Backward Citations)
US1927947A
Cited
US2210448A
Cited
US2200788A
Cited
US2662590A
Cited
GB780188A
Cited
US3323550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-24 | 1972-09-23 | 1973-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-24 | 1976-09-23 | 1977-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-24 | 1980-09-23 | 1981-03-25 | $7700.00 | Window Closed / Lapsed |