US2737779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensable vapor extraction apparatus
Assignee: Individual
•
Filing: 1946-05-24
•
Granted: 1956-03-13
•
Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Ernest O Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:21
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0003; B01D5/0033; B01D5/0045; B01D5/0078; B01D5/0084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN COMBINATION WITH A VACUUM APPARATUS COMPRISING A VESSEL TO BE EVACUATED AND HAVING A HIGH VACUUM PUMPING APPARATUS CONNECTED THERETO, A MOISTURE TRAP COMPRISING A FLASK ADAPTED TO CONTAIN A COOLANT SUCH AS LIQUID AIR, LIQUID NITROGEN, OR THE LIKE, MEANS FOR SUPPORTING SAID FLASK WITH ITS EXTERIOR IN CONTACT WITH THE ATMOSPHERE IN SAID VESSEL, AND MEANS OPEABLE TO SEAL OFF SAID FLASK FROM THE ATMOSPHERE IN SAID VESSEL WITHOUT OPENING SAID VESSEL TO EXTERIOR ATMOSPHERE.
Claim 2
Dependent Claim
78 words
IN COMBINATION WITH A VACUUM APPARATUS COMPRISING A VESSEL TO BE EVACUATED AND HAVING A HIGH VACUUM PUMPING APPARATUS CONNECTED THERETO, A MOISTURE TRAP COMPRISING A FLASK ADAPTED TO CONTAIN A COOLANT SUCH AS LIQUID AIR, LIQUID NITROGEN, OR THE LIKE, MEANS FOR SUPPORTING SAID FLASK WITH ITS EXTERIOR IN CONTACT WITH THE ATMOSPHERE IN SAID VESSEL, AND MEANS OPEABLE TO SEAL OFF SAID FLASK FROM THE ATMOSPHERE IN SAID VESSEL WITHOUT OPENING SAID VESSEL TO EXTERIOR ATMOSPHERE.
References Cited (Backward Citations)
US1307999A
Cited
US2214838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |