US2609470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resistance materials and elements
Assignee: General Electric Co
•
Filing: 1949-07-22
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Granted: 1952-09-02
•
Expires: 1969-07-22
Abstract
No abstract record available.
Inventors
- 👤 Frederic R Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01B; H01B1/00; H01B1/06; H01B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A STABLE ELECTRIC RESISTANCE UNIT COMPRISING A BODY OF RESISTANCE MATERIAL CONSISTING ESSENTIALLY OF A PRESSED MIXTURE OF METAL SULFIDES INCLUDING (1) FROM 3 TO 95 PER CENT OF A SULFIDE OF A METAL OF GROUP II OF THE PERIODIC TABLE SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM, CALCIUM, ZINC, CADMIUM, BARIUM AND MERCURY, AND (2) MOLYBDENUM SULFIDE AND METAL LEADS ELECTRICALLY CONNECTED TO SAID BODY OF RESISTANCE MATERIAL.
Claim 2
Dependent Claim
69 words
A STABLE ELECTRIC RESISTANCE UNIT COMPRISING A BODY OF RESISTANCE MATERIAL CONSISTING ESSENTIALLY OF A PRESSED MIXTURE OF METAL SULFIDES INCLUDING (1) FROM 3 TO 95 PER CENT OF A SULFIDE OF A METAL OF GROUP II OF THE PERIODIC TABLE SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM, CALCIUM, ZINC, CADMIUM, BARIUM AND MERCURY, AND (2) MOLYBDENUM SULFIDE AND METAL LEADS ELECTRICALLY CONNECTED TO SAID BODY OF RESISTANCE MATERIAL.
References Cited (Backward Citations)
US959068A
Cited
US1820591A
Cited
FR701172A
Cited
GB360920A
Cited
GB367790A
Cited
AT144608B
Cited
US2197115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |