Patent US3073951A successfully refreshed from Google Patents.
US3073951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum lock
Assignee: Combustion Engineering Inc
•
Filing: 1960-07-28
•
Granted: 1963-01-15
•
Expires: 1980-07-28
Abstract
No abstract record available.
Inventors
- 👤 Charles E Burdg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:06
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/04; H01J49/0495; H01J9/00; H01J9/38; H01J9/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A VACUUM LOCK COMPRISING A FIRST APERTURED PLATE MEMBER CONNECTED WITH A VACUUM CHAMBER WITH THE APERTURE IN COMMUNICATION WITH SAID CHAMBER, A SECOND PLATE MEMBER MATING WITH AND MOVABLE ON SAID FIRST PLATE MEMBER WITH MATING SURFACES OF THE PLATES FORMING A SUBSTANTIALLY AIR TIGHT JOINT, A SERIES OF CAVITIES IN SAID SECOND PLATE MOVABLE WITH SAID SECOND PLATE ALONG A SELECTED PATH INTO ALIGNMENT, ONE AT A TIME WITH SAID APERTURE, A SERIES OF VACUUM APERTURES IN SAID FIRST PLATE ARRANGED IN THE PATH OF MOVEMENT OF SAID CAVITIES.
Claim 2
Dependent Claim
91 words
A VACUUM LOCK COMPRISING A FIRST APERTURED PLATE MEMBER CONNECTED WITH A VACUUM CHAMBER WITH THE APERTURE IN COMMUNICATION WITH SAID CHAMBER, A SECOND PLATE MEMBER MATING WITH AND MOVABLE ON SAID FIRST PLATE MEMBER WITH MATING SURFACES OF THE PLATES FORMING A SUBSTANTIALLY AIR TIGHT JOINT, A SERIES OF CAVITIES IN SAID SECOND PLATE MOVABLE WITH SAID SECOND PLATE ALONG A SELECTED PATH INTO ALIGNMENT, ONE AT A TIME WITH SAID APERTURE, A SERIES OF VACUUM APERTURES IN SAID FIRST PLATE ARRANGED IN THE PATH OF MOVEMENT OF SAID CAVITIES.
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) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |