Patent US2097390A successfully refreshed from Google Patents.
Patent US2674678A successfully refreshed from Google Patents.
US2674678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistor
Assignee: Shallcross Manufacturing Co
•
Filing: 1950-08-16
•
Granted: 1954-04-06
•
Expires: 1970-08-16
Abstract
No abstract record available.
Inventors
- 👤 Richard E B Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:12
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A RESISTOR COMPRISING A LAYER OF WIRE EMBEDDED IN A HARDENABLE PLASTIC COMPOSITION COMPRISING, BY WEIGHT, ZIRCONIUM OXIDE 300 TO 450 PARTS, CLAY 100 TO 200 PARTS, AN ADDITIONAL REFRACTORY OXIDE 100 TO 200 PARTS, AND SUFFICIENT ALUMIUM SESQUI-PHOSPHATE TO PROVIDE A SUITABLY VISCOUS CONSISTENCY PRIOR TO FIRING, SAID COMPOSITION BEING FIRED TO A SOLID MASS.
Claim 2
Dependent Claim
56 words
A RESISTOR COMPRISING A LAYER OF WIRE EMBEDDED IN A HARDENABLE PLASTIC COMPOSITION COMPRISING, BY WEIGHT, ZIRCONIUM OXIDE 300 TO 450 PARTS, CLAY 100 TO 200 PARTS, AN ADDITIONAL REFRACTORY OXIDE 100 TO 200 PARTS, AND SUFFICIENT ALUMIUM SESQUI-PHOSPHATE TO PROVIDE A SUITABLY VISCOUS CONSISTENCY PRIOR TO FIRING, SAID COMPOSITION BEING FIRED TO A SOLID MASS.
References Cited (Backward Citations)
USRE16159E
Cited
GB191411993A
Cited
US2363329A
Cited
US2357072A
Cited
US2416864A
Cited
US2428053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |