Patent US2645701A successfully refreshed from Google Patents.
US2645701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical resistor and resistance elements therefor
Assignee: Johnson Matthey PLC
•
Filing: 1951-05-10
•
Granted: 1953-07-14
•
Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Kerridge Frank Enoch
- 👤 Belham Michael
- 👤 Pearce Graham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:42
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/06; H01C17/20; H01B; H01B1/00; H01C17/04; H01C3/00; H01C7/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49096; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD OF MAKING AN ELECTRICAL RESISTANCE ELEMENT WHICH COMPRISES THE STEPS OF APPLYING TO A GLASS FILAMENT A SOLUTION OF THE SULPHORESINATE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND PLATINUM DISSOLVED IN AN ESSENTIAL OIL SOLVENT MIXTUE, FIRING SAID COATED FILAMENT AT A TEMPERATURE SUFFICIENT TO BURN AWAY
Claim 2
Independent Claim
55 words
A METHOD OF MAKING AN ELECTRICAL RESISTANCE ELEMENT WHICH COMPRISES THE STEPS OF APPLYING TO A GLASS FILAMENT A SOLUTION OF THE SULPHORESINATE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND PLATINUM DISSOLVED IN AN ESSENTIAL OIL SOLVENT MIXTUE, FIRING SAID COATED FILAMENT AT A TEMPERATURE SUFFICIENT TO BURN AWAY
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |