US2508511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor coated with ceramic composition
Assignee: AT&T Inc
•
Filing: 1946-12-12
•
Granted: 1950-05-23
•
Expires: 1966-12-12
Abstract
No abstract record available.
Inventors
- 👤 Goodman Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:45
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN ELECTRICAL RESISTER COMPRISING A WIREWOUND CERAMIC CORE COATED WITH A FUSED ENAMEL GLAZE RESULTING FROM THE FUSING OF A MIXTURE OF COLLOIDAL CLAY AND A FINELY DIVIDED LEAD BOROSILICATE FRIT CONSISTING OF 25 PER CENT TO 36.9 PER CENT SIO2, 10 PER CENT TO 24.5 PER CENT PB3O4, 8.9 PER CENT TO 30.9 PER CENT H3BC3 AND 10 PER CENT TO 30 PER CENT BI2O3.
Claim 2
Dependent Claim
66 words
AN ELECTRICAL RESISTER COMPRISING A WIREWOUND CERAMIC CORE COATED WITH A FUSED ENAMEL GLAZE RESULTING FROM THE FUSING OF A MIXTURE OF COLLOIDAL CLAY AND A FINELY DIVIDED LEAD BOROSILICATE FRIT CONSISTING OF 25 PER CENT TO 36.9 PER CENT SIO2, 10 PER CENT TO 24.5 PER CENT PB3O4, 8.9 PER CENT TO 30.9 PER CENT H3BC3 AND 10 PER CENT TO 30 PER CENT BI2O3.
References Cited (Backward Citations)
US257643A
Cited
US2018600A
Cited
US2207723A
Cited
US2370443A
Cited
US2385580A
Cited
US2425032A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |