Patent US4486803A successfully refreshed from Google Patents.
Patent US3099995A successfully refreshed from Google Patents.
US3099995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-pneumatic transducer
Assignee: WH Joens and Co GmbH
•
Filing: 1961-05-16
•
Granted: 1963-08-06
•
Expires: 1981-05-16
Abstract
No abstract record available.
Inventors
- 👤 Raufenbarth Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:14
CPC Classifications
F; F15; F15B; F15B5/00; F15B5/003; Y; Y10; Y10T; Y10T137/00; Y10T137/2278
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
73 words
AN ELECTRO-PNEUMATIC TRANSDUCER FOR CONTROL AND REGULATING PURPOSE, SAID TRANSDUCER INCLUDING: A WORKING PRESSURE CHAMBER; A THROTTLE CONNECTED TO SAID WORKING PRESSURE CHAMBER; AND FLUID SUPPLY MEANS INCLUDING AN ELECTRO-MAGNETIC DEVICE ACTUATED BY ELECTRICAL IMPULSES HAVING A FREQUENCY OF MORE THAN 10 CYCLES PER SECOND, SAID MEANS COMMUNICATING WITH SAID THROTTLE TO SUPPLY FLUID UNDER A FIRST PRESSURE TO SAID THROTTLE AND THUS TO SAID CHAMBER IN IMPULSES CORRESPONDING TO THE ELECTRICAL IMPULSES.
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) | 1966-08-05 | 1967-02-04 | 1967-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-05 | 1971-02-04 | 1971-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-05 | 1975-02-04 | 1975-08-06 | $7700.00 | Window Closed / Lapsed |