Patent US3178864A successfully refreshed from Google Patents.
US3178864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of glass cells containing helium of high purity
Assignee: Individual
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Filing: 1963-01-25
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Granted: 1965-04-20
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Expires: 1983-01-25
Abstract
No abstract record available.
Inventors
- 👤 Fred W Anderson
- 👤 Technology Massachusetts In Of
- 👤 Charles R Larkin
- 👤 Wellman L Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:14
CPC Classifications
H; H01; H01J; H01J41/00; H01J41/12; H01J41/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
APPARATUS FOR PRODUCING CELLS OF PURE HELIUM COMPRISING, IN COMBINATION; A MANIFOLD HAVING ATTACHED THERETO AT LEAST ONE GLASS CELL TO BE FILLED WITH PURE HELIUM, AN EVACUATIONSYSTEMFOR CREATING AN INITIALLY HIGH VACUUM AND HAVING A VALVE CONNECTING THE EVACUATION SYSTEM TO THE MANIFOLD FOR DISCONNECTING THE EVACUATION SYSTEM FROM THE MANIFOLD AFTER A PREDETERMINED VACUUM IS OBTAINED, A HEATED THIN-WALLED SILICA TUBE CONNECTED TO SAID MANIFOLD FOR DIFFUSING HELIUM THERETHROUGH AFTER THE VACUUM IS CREATED BY SAID EVCUATION SYSTEM, A MICROWAVE DISCHARGE MEANS ADJACENT TO SAID CELL FOR OUTGASSING SAID CELL, AND MEANS CONNECTED TO SAID MANIFOLD FOR SUBLIMING TITANIUM.
Claim 2
Dependent Claim
101 words
APPARATUS FOR PRODUCING CELLS OF PURE HELIUM COMPRISING, IN COMBINATION; A MANIFOLD HAVING ATTACHED THERETO AT LEAST ONE GLASS CELL TO BE FILLED WITH PURE HELIUM, AN EVACUATIONSYSTEMFOR CREATING AN INITIALLY HIGH VACUUM AND HAVING A VALVE CONNECTING THE EVACUATION SYSTEM TO THE MANIFOLD FOR DISCONNECTING THE EVACUATION SYSTEM FROM THE MANIFOLD AFTER A PREDETERMINED VACUUM IS OBTAINED, A HEATED THIN-WALLED SILICA TUBE CONNECTED TO SAID MANIFOLD FOR DIFFUSING HELIUM THERETHROUGH AFTER THE VACUUM IS CREATED BY SAID EVCUATION SYSTEM, A MICROWAVE DISCHARGE MEANS ADJACENT TO SAID CELL FOR OUTGASSING SAID CELL, AND MEANS CONNECTED TO SAID MANIFOLD FOR SUBLIMING TITANIUM.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |