US2597562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conducting layer
Assignee: General Electric Co
•
Filing: 1949-03-30
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Granted: 1952-05-20
•
Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Katharine B Blodgett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:15
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; C; C03; C03C; C03C17/00; C03C17/06; C03C17/22; C03C17/23; H01J5/00; H01J5/02; H01J5/06; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/213; C03C2217/25; C03C2217/263; C03C2218/00; C03C2218/10; C03C2218/17; C03C2218/30; C03C2218/32; C03C2218/324; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF IMPARTING A PREDICTABLE HIGH SURFACE RESISTIVITY TO LEAD GLASS WHICH COMPRISES FORMING A THIN SURFACE FILM OF SILICA ON A SPECIMEN OF LEAD GLASS HAVING A LEAD OXIDE CONTENT OF AT LEAST 60% BY WEIGHT, AND HEATING SAID SPECIMEN IN A REDUCING ATMOSPHERE AT A SUBSTANTIALLY CONSTANT TEMPERATURE SELECTED FROM THE RANGE OF ABOUT 300* C. TO 500* C. FOR A TIME CORRELATED WITH THE SELECTED TEMPERATURE.
Claim 2
Independent Claim
70 words
THE METHOD OF IMPARTING A PREDICTABLE HIGH SURFACE RESISTIVITY TO LEAD GLASS WHICH COMPRISES FORMING A THIN SURFACE FILM OF SILICA ON A SPECIMEN OF LEAD GLASS HAVING A LEAD OXIDE CONTENT OF AT LEAST 60% BY WEIGHT, AND HEATING SAID SPECIMEN IN A REDUCING ATMOSPHERE AT A SUBSTANTIALLY CONSTANT TEMPERATURE SELECTED FROM THE RANGE OF ABOUT 300* C. TO 500* C. FOR A TIME CORRELATED WITH THE SELECTED TEMPERATURE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |