Patent US3040282A successfully refreshed from Google Patents.
US3040282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve resistors
Assignee: Ohio Brass Co
•
Filing: 1959-06-25
•
Granted: 1962-06-19
•
Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Donald L Heath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:32
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/118; H01B; H01B1/00; H01B1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
THE METHOD OF PRODUCING A RESISTOR WHICH COMPRISES MIXING 50 TO 80 PERCENT OF SILICON CARBIDE; 5 TO 35 PERCENT ALUMINUM CONTAINING MATERIAL OF THE CLASS CONSISTING OF (1) ALUMINUM PHOSPHATE, (2) ALUMINUM OXIDE AND PHOSPHORIC ACID, AND (3) ALUMINUM OXIDE AND REACTIVE PHOSPHATE; AND 0.5 TO 10 PERCENT OF A FLUX COMPOSED ESSENTIALLY OF STANNIC OXIDE AND THEN PASSING THE MIXTURE INTO A BLOCK AND FIRING TO 2200 TO 2400*F.
Claim 2
Independent Claim
71 words
THE METHOD OF PRODUCING A RESISTOR WHICH COMPRISES MIXING 50 TO 80 PERCENT OF SILICON CARBIDE; 5 TO 35 PERCENT ALUMINUM CONTAINING MATERIAL OF THE CLASS CONSISTING OF (1) ALUMINUM PHOSPHATE, (2) ALUMINUM OXIDE AND PHOSPHORIC ACID, AND (3) ALUMINUM OXIDE AND REACTIVE PHOSPHATE; AND 0.5 TO 10 PERCENT OF A FLUX COMPOSED ESSENTIALLY OF STANNIC OXIDE AND THEN PASSING THE MIXTURE INTO A BLOCK AND FIRING TO 2200 TO 2400*F.
References Cited (Backward Citations)
US2000719A
Cited
US2276732A
Cited
US2445296A
Cited
US2589157A
Cited
US2806005A
Cited
US2988406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |