US3100997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm vacuum gauge
Assignee: WC Heraus GmbH and Co KG
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Filing: 1961-08-07
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Granted: 1963-08-20
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Expires: 1981-08-07
Abstract
No abstract record available.
Inventors
- 👤 Lorenz Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:26
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0041; G01L9/0076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
A DIAPHRAGM VACUUM GAUGE COMPRISING A CUP-SHAPED SUPPORTING BASE HAVING AN APERTURE AND ADAPTED TO BE CONNECTED TO A VESSEL THE PRESSURE IN WHICH IS TO BE MEASURED, A DIAPHRAGM SECURED TO THE RIM OF SAID BASE AND WITH SAID BASE ENCLOSING A CHAMBER ADAPTED TO COMMUNICATE THROUGH SAID APERTURE WITH THE INSIDE OF SAID VESSEL, A SUPPORTING MEMBER MOUNTED ON SAID BASE OUTSIDE OF SAID CHAMBER, A SCREEN MOUNTED IN A FIXED POSITION ON SAID SUPPORTING MEMBER, A SECOND SCREEN RIGIDLY CONNECTED TO SAID DIAPHRAGM SO AS TO BE MOVABLE THEREWITH AND EXTENDING VERTICALLY TO SAID DIAPHRAGM AND PARALLEL TO SAID FIXED SCREEN SO AS TO BE MOVABLE PARALLEL THERETO, EACH OF SAID SCREENS HAVING A PLURALITY OF ALTERNATING OPAQUE AND TRANSPARENT AREAS, SAID OPAQUE AREAS OF ONE OF SAID SCREENS ADAPTED IN ONE POSITION OF SAID MOVABLE SCREEN TO BE DISPOSED IN POSITIONS DIFFERENT FROM THE POSITIONS OF THE OPAQUE AREAS OF THE OTHER SCREEN SO AS COMPLETELY TO COVER THE TRANSPARENT AREAS OF THE OTHER SCREEN, WHILE IN ANOTHER POSITION OF SAID MOVABLE SCREEN SAID OPAQUE AREAS OF BOTH SCREENS ARE DISPOSED IN CORRESPONDING POSITIONS SO AS TO PERMIT A MAXIMUM AMOUNT OF LIGHT TO PASS THROUGH SAID SCREENS, A GLASS COVER SECURED TO SAID BASE AND COM-
Claim 2
Dependent Claim
211 words
A DIAPHRAGM VACUUM GAUGE COMPRISING A CUP-SHAPED SUPPORTING BASE HAVING AN APERTURE AND ADAPTED TO BE CONNECTED TO A VESSEL THE PRESSURE IN WHICH IS TO BE MEASURED, A DIAPHRAGM SECURED TO THE RIM OF SAID BASE AND WITH SAID BASE ENCLOSING A CHAMBER ADAPTED TO COMMUNICATE THROUGH SAID APERTURE WITH THE INSIDE OF SAID VESSEL, A SUPPORTING MEMBER MOUNTED ON SAID BASE OUTSIDE OF SAID CHAMBER, A SCREEN MOUNTED IN A FIXED POSITION ON SAID SUPPORTING MEMBER, A SECOND SCREEN RIGIDLY CONNECTED TO SAID DIAPHRAGM SO AS TO BE MOVABLE THEREWITH AND EXTENDING VERTICALLY TO SAID DIAPHRAGM AND PARALLEL TO SAID FIXED SCREEN SO AS TO BE MOVABLE PARALLEL THERETO, EACH OF SAID SCREENS HAVING A PLURALITY OF ALTERNATING OPAQUE AND TRANSPARENT AREAS, SAID OPAQUE AREAS OF ONE OF SAID SCREENS ADAPTED IN ONE POSITION OF SAID MOVABLE SCREEN TO BE DISPOSED IN POSITIONS DIFFERENT FROM THE POSITIONS OF THE OPAQUE AREAS OF THE OTHER SCREEN SO AS COMPLETELY TO COVER THE TRANSPARENT AREAS OF THE OTHER SCREEN, WHILE IN ANOTHER POSITION OF SAID MOVABLE SCREEN SAID OPAQUE AREAS OF BOTH SCREENS ARE DISPOSED IN CORRESPONDING POSITIONS SO AS TO PERMIT A MAXIMUM AMOUNT OF LIGHT TO PASS THROUGH SAID SCREENS, A GLASS COVER SECURED TO SAID BASE AND COM-
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) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |