Patent US2956027A successfully refreshed from Google Patents.
Patent US3314599A successfully refreshed from Google Patents.
US3314599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump apparatus
Assignee: Leybold Holding AG
•
Filing: 1965-06-22
•
Granted: 1967-04-18
•
Expires: 1985-06-22
Abstract
No abstract record available.
Inventors
- 👤 Rollinger Willy
- 👤 Bode Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:12
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08; F; F04; F04C; F04C27/00; F04C27/02; Y; Y10; Y10S; Y10S418/00; Y10S418/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A GAS PUMP APPARATUS COMPRISING: A PUMPING CHAMBER AND AN EXHAUST CHANNEL OPENING FROM SAID CHAMBER; AN EXHAUST VALVE CONTROLLING THE FLOW OF GAS THROUGH SAID EXHAUST CHANNEL; MEANS FOR CONTAINING A POOL OF SEALING LIQUID OVERLYING SAID EXHAUST VALVE, WHEREBY GAS FLOWING THROUGH SAID EXHAUST VALVE PASSES THROUGH THE SEALING LIQUID; A HOODLIKE LIQUID SEPARATING MEMBER POSITIONED ADJACENT TO SAID EXHAUST CHANNEL TO INTERCEPT AND DEFLECT THE GAS FLOWING THROUGH SAID EXHAUST VALVE; SAID HOODLIKE MEMBER DEFINING A BOTTOM OPENING DISPOSED TO LIE BENEATH THE SURFACE OF THE SEALING LIQUID, AND A SIDE OPENING FORMED BY AN EDGE LYING IN A PLANE TRANSVERSE TO SAID BOTTOM OPENING; AND SAID SIDE OPENING EDGE HAVING A RE-ENTRANT PORTION DEFINING A LIQUID COLLECTION CHANNEL HAVING AN ELONGATED OPENING ADAPTED TO RECEIVE A FILM OF SEALING FLUID INTERCEPTED BY AND MIGRATING ALONG SAID HOODLIKE SEPARATING MEMBER.
Claim 2
Dependent Claim
143 words
A GAS PUMP APPARATUS COMPRISING: A PUMPING CHAMBER AND AN EXHAUST CHANNEL OPENING FROM SAID CHAMBER; AN EXHAUST VALVE CONTROLLING THE FLOW OF GAS THROUGH SAID EXHAUST CHANNEL; MEANS FOR CONTAINING A POOL OF SEALING LIQUID OVERLYING SAID EXHAUST VALVE, WHEREBY GAS FLOWING THROUGH SAID EXHAUST VALVE PASSES THROUGH THE SEALING LIQUID; A HOODLIKE LIQUID SEPARATING MEMBER POSITIONED ADJACENT TO SAID EXHAUST CHANNEL TO INTERCEPT AND DEFLECT THE GAS FLOWING THROUGH SAID EXHAUST VALVE; SAID HOODLIKE MEMBER DEFINING A BOTTOM OPENING DISPOSED TO LIE BENEATH THE SURFACE OF THE SEALING LIQUID, AND A SIDE OPENING FORMED BY AN EDGE LYING IN A PLANE TRANSVERSE TO SAID BOTTOM OPENING; AND SAID SIDE OPENING EDGE HAVING A RE-ENTRANT PORTION DEFINING A LIQUID COLLECTION CHANNEL HAVING AN ELONGATED OPENING ADAPTED TO RECEIVE A FILM OF SEALING FLUID INTERCEPTED BY AND MIGRATING ALONG SAID HOODLIKE SEPARATING MEMBER.
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) | 1970-04-17 | 1970-10-17 | 1971-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-17 | 1974-10-17 | 1975-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-17 | 1978-10-17 | 1979-04-18 | $7700.00 | Window Closed / Lapsed |