US3095494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultra high vacuum device
Assignee: New York Air Brake LLC
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Filing: 1960-02-25
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Granted: 1963-06-25
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Expires: 1980-02-25
Abstract
No abstract record available.
Inventors
- 👤 Richard A Denton
- 👤 Michael P Rivera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:04
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; C; C23; C23C; C23C14/00; C23C14/22; C23C14/56; F; F04; F04F; F04F9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN COMBINATION, AN INNER CASING ENCLOSING A VACUUM CHAMBER HAVING AN OUTLET PORT; AT LEAST ONE PENETRATION THROUGH THE WALL OF THE INNER CASING; A NONHERMETIC, BAKEABLE SEAL FOR EACH PENETRATION; MEANS FOR HEATING THE INNER CASING; AN OUTER CASING ENCLOSING A SPACE SURROUNDING EACH SEALED PENETRATION; A FIRST PUMPING SYSTEM CAPABLE OF OPERATING AT PRESSURES AT LEAST AS LOW AS 1X10**-9 MM. HG AND CONNECTED WITH THE OUTLET PORT FOR EVACUATING THE VACUUM CHAMBER; AND A SECOND PUMPING SYSTEM CONNECTED WITH THE SPACED ENCLOSED BY THE OUTER CASING FOR EVACUATING IT TO A PRESSURE AT LEAST AS LOW AS 1X10**-3 MM. HG, EACH SEALED PENETRATION PROVIDING A LEAKAGE PATH WHOSE CONDUCTANCE IS CORRELATED WITH THE PUMPING SPEED OF THE FIRST PUMPING SYSTEM, THE RATE OF EVOLUTION OF AD-
Claim 2
Dependent Claim
129 words
IN COMBINATION, AN INNER CASING ENCLOSING A VACUUM CHAMBER HAVING AN OUTLET PORT; AT LEAST ONE PENETRATION THROUGH THE WALL OF THE INNER CASING; A NONHERMETIC, BAKEABLE SEAL FOR EACH PENETRATION; MEANS FOR HEATING THE INNER CASING; AN OUTER CASING ENCLOSING A SPACE SURROUNDING EACH SEALED PENETRATION; A FIRST PUMPING SYSTEM CAPABLE OF OPERATING AT PRESSURES AT LEAST AS LOW AS 1X10**-9 MM. HG AND CONNECTED WITH THE OUTLET PORT FOR EVACUATING THE VACUUM CHAMBER; AND A SECOND PUMPING SYSTEM CONNECTED WITH THE SPACED ENCLOSED BY THE OUTER CASING FOR EVACUATING IT TO A PRESSURE AT LEAST AS LOW AS 1X10**-3 MM. HG, EACH SEALED PENETRATION PROVIDING A LEAKAGE PATH WHOSE CONDUCTANCE IS CORRELATED WITH THE PUMPING SPEED OF THE FIRST PUMPING SYSTEM, THE RATE OF EVOLUTION OF AD-
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) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |