US2899257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Getter for electron discharge device
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:25
CPC Classifications
H; H01; H01J; H01J7/00; H01J7/14; H01J7/18; H01J7/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A GAS CLEANUP DEVICE COMPRISING A POROUS REFRACTORY BODY, SAID BODY BEING IMPREGNATED WITH A MATERIAL WHICH LIBERATES A CHEMICALLY ACTIVE SUBSTANCE UPON HEATING SAID BODY BEING INERT WITH RESPECT TO SAID CHEMICALLY ACTIVE SUBSTANCE.
Claim 2
Dependent Claim
35 words
A GAS CLEANUP DEVICE COMPRISING A POROUS REFRACTORY BODY, SAID BODY BEING IMPREGNATED WITH A MATERIAL WHICH LIBERATES A CHEMICALLY ACTIVE SUBSTANCE UPON HEATING SAID BODY BEING INERT WITH RESPECT TO SAID CHEMICALLY ACTIVE SUBSTANCE.
References Cited (Backward Citations)
US1605087A
Cited
US1967575A
Cited
US1952717A
Cited
US1965588A
Cited
US2173259A
Cited
US2208692A
Cited
US2362468A
Cited
US2412302A
Cited
US2421984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |