US3211937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon-coated electron-transmission window
Assignee: Individual
•
Filing: 1962-04-20
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Granted: 1965-10-12
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Expires: 1982-04-20
Abstract
No abstract record available.
Inventors
- 👤 Ross E Hester
- 👤 William A Sherwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:19
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/02; H01J5/18; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49982; Y10T29/49986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A BEAM WINDOW FOR TRANSFERRING AN ELECTRON PARTICLE BEAM BETWEEN DIFFERENT PRESSURED REGIONS, SAID BEAM BEING SUBSTANTIALLY CYLINDRICAL, COMPRISING (A) A THIN FOIL, IMPERVIOUS TO GAS AND PERVIOUS TO SAID PARTICLE BEAM AND POSITIONED ACROSS SAID BEAM, AND (B) A THIN CONTINUOUS COATING OF CARBON ADHERE TO SAID FOIL.
Claim 2
Dependent Claim
49 words
A BEAM WINDOW FOR TRANSFERRING AN ELECTRON PARTICLE BEAM BETWEEN DIFFERENT PRESSURED REGIONS, SAID BEAM BEING SUBSTANTIALLY CYLINDRICAL, COMPRISING (A) A THIN FOIL, IMPERVIOUS TO GAS AND PERVIOUS TO SAID PARTICLE BEAM AND POSITIONED ACROSS SAID BEAM, AND (B) A THIN CONTINUOUS COATING OF CARBON ADHERE TO SAID FOIL.
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) | 1968-10-11 | 1969-04-12 | 1969-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-11 | 1973-04-12 | 1973-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-11 | 1977-04-12 | 1977-10-12 | $7700.00 | Window Closed / Lapsed |