US2570869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing thin wires
Assignee: Hartford National Bank and Trust Co
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Filing: 1947-07-15
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Granted: 1951-10-09
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Expires: 1967-07-15
Abstract
No abstract record available.
Inventors
- 👤 Schmidt Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:43
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/04; B21C37/047; C; C23; C23F; C23F1/00; C23F1/10; C23F1/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49995
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE METHOD OF REDUCING TO MINUTE SIZE ELECTRICALLY CONDUCTIVE FILAMENTARY MATERIAL OF A SINGLE ELEMENT OF RELATIVELY HIGH FUSION TEMPERATURE WHICH COMPRISES, HEATING THE MATERIAL BY THE PASSAGE OF AN ELECTRIC CURRENT THERETHROUGH IN A SURROUNDING ATMOSPERE OF A GAS WHICH IS REACTIVE WITH RESPECT TO THE SAID MATERIAL, AT A LOW PRESSURE OF LESS THAN APPROXIMATELY 50 BARYES, WHILE MAINTAINING THE PRESSURE OF SAID GAS APPROXIMATELY CONSTANT AND MAINTAINING THE HEATED MATERIAL AT A TEMPERATURE WHICH IS BELOW ITS FUSION POINT AND AT WHICH THE TEMPERATURE COEFFICIENT OF THE REACTION OF SAID MATERIAL WITH THE GAS IS ZERO OR NEGATIVE UNTIL THE DESIRED MINUTE IS ATTAINED.
Claim 2
Independent Claim
107 words
THE METHOD OF REDUCING TO MINUTE SIZE ELECTRICALLY CONDUCTIVE FILAMENTARY MATERIAL OF A SINGLE ELEMENT OF RELATIVELY HIGH FUSION TEMPERATURE WHICH COMPRISES, HEATING THE MATERIAL BY THE PASSAGE OF AN ELECTRIC CURRENT THERETHROUGH IN A SURROUNDING ATMOSPERE OF A GAS WHICH IS REACTIVE WITH RESPECT TO THE SAID MATERIAL, AT A LOW PRESSURE OF LESS THAN APPROXIMATELY 50 BARYES, WHILE MAINTAINING THE PRESSURE OF SAID GAS APPROXIMATELY CONSTANT AND MAINTAINING THE HEATED MATERIAL AT A TEMPERATURE WHICH IS BELOW ITS FUSION POINT AND AT WHICH THE TEMPERATURE COEFFICIENT OF THE REACTION OF SAID MATERIAL WITH THE GAS IS ZERO OR NEGATIVE UNTIL THE DESIRED MINUTE IS ATTAINED.
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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |