US3144035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High vacuum system
Assignee: National Research Corp
•
Filing: 1963-02-01
•
Granted: 1964-08-11
•
Expires: 1983-02-01
Abstract
No abstract record available.
Inventors
- 👤 Hablanian Marsbed
- 👤 Robert J Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:01
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/006; F; F16; F16J; F16J15/00; F16J15/002; F16J15/006; F16J15/16; F16J15/40; F16L; F16L23/00; Y; Y10; Y10S; Y10S285/00; Y10S285/904; Y10T; Y10T137/00; Y10T137/0318; Y10T137/5762; Y10T137/8593; Y10T137/85978; Y10T137/86083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF SEALING THE LEAKAGE PATH THROUGH A DEMOUNTABLE CLOSURE OF AN ULTRA HIGH VACUUM SYSTEM COMPRISING THE STEPS OF PROVIDING A FLEXIBLE GASKET IN SAID LEAKAGE PATH, SAID GASKET BEING MADE OF AN ORGANIC MATERIAL HAVING A CHARACTERISTIC VAPOR PRESSURE LESS THAN 10**-8 MM. HG AT 20*C., AND DOUBLE PUMPING THE GASKET.
Claim 2
Independent Claim
54 words
A METHOD OF SEALING THE LEAKAGE PATH THROUGH A DEMOUNTABLE CLOSURE OF AN ULTRA HIGH VACUUM SYSTEM COMPRISING THE STEPS OF PROVIDING A FLEXIBLE GASKET IN SAID LEAKAGE PATH, SAID GASKET BEING MADE OF AN ORGANIC MATERIAL HAVING A CHARACTERISTIC VAPOR PRESSURE LESS THAN 10**-8 MM. HG AT 20*C., AND DOUBLE PUMPING THE GASKET.
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) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |