US3923698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistors for ignition plugs
Assignee: Denso Corp
•
Filing: 1973-10-31
•
Granted: 1975-12-02
•
Expires: 1993-10-31
Abstract
Abstract Resistors are made of glass and a resistance material comprising 1 to 16 % by weight aluminum oxide, 75.6 to 98 % by weight tin oxide and 0.84 to 9.9 % by weight antimony oxide. Such resistors are produced by adding low melting-point glass to the resistor components so that the latter can be made to stick together and harden into coherent solid bodies.
Inventors
- 👤 Osami Kamigaito
- 👤 Hideyuki Masaki
- 👤 Masami Oki
- 👤 Masatosi Suzuki
- 👤 Yasuo Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:59
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/40; H01T13/41; H01T13/20; H01T13/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
A RESISTOR CONSISTING ESSENTIALLY OF 40 TO 90% BY WEIGHT OF RESISTANCE MATERIAL AND 10 TO 60% BY WEIGHT OF LOW MELTING GLASS, THE RESISTANCE MATERIAL COMPRISING 1 TO 16% BY WEIGHT OF ALUMINUM OXIDE, 75.6 TO 98% BY WEIGHT OF TIN OXIDE AND 0.84 TO 9.9% BY WEIGHT OF ANTIMONY OXIDE, THE COMPONENTS OF SAID RESISTANCE MATERIAL BEING ADHERED TOGETHER AND HARDENED INTO COHERENT SOLID BODIES BY SAID LOW MELTING GLASS.
Claim 2
Dependent Claim
72 words
A RESISTOR CONSISTING ESSENTIALLY OF 40 TO 90% BY WEIGHT OF RESISTANCE MATERIAL AND 10 TO 60% BY WEIGHT OF LOW MELTING GLASS, THE RESISTANCE MATERIAL COMPRISING 1 TO 16% BY WEIGHT OF ALUMINUM OXIDE, 75.6 TO 98% BY WEIGHT OF TIN OXIDE AND 0.84 TO 9.9% BY WEIGHT OF ANTIMONY OXIDE, THE COMPONENTS OF SAID RESISTANCE MATERIAL BEING ADHERED TOGETHER AND HARDENED INTO COHERENT SOLID BODIES BY SAID LOW MELTING GLASS.
Claim 3
Dependent Claim
13 words
A resistor according to claim 1, wherein the glass is a borosilicate glass.
Claim 4
Dependent Claim
23 words
A resistor according to claim 1, wherein the glass is 20 to 60% by weight of the total of glass and resistance material.
Claim 5
Dependent Claim
25 words
A resistor according to claim 1, wherein the antimony oxide is 1 to 10% by weight of the total of tin oxide and antimony oxide.
Claim 6
Dependent Claim
17 words
A resistor according to claim 1 wherein said resistor has a resistance of 3 to 20 kiloohms.
Claim 7
Dependent Claim
16 words
A resistor according to claim 1 wherein the antimony oxide is antimony trioxide or antimony tetroxide.
Claim 8
Dependent Claim
13 words
A resistor according to claim 6 wherein the antimony oxide is antimony trioxide.
Claim 9
Dependent Claim
13 words
A resistor according to claim 6 wherein the antimony oxide is antimony tetroxide.
References Cited (Backward Citations)
US3088921A
Cited
US3577355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |