Patent US2645733A successfully refreshed from Google Patents.
US2645733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator
Assignee: Union Carbide Corp
•
Filing: 1950-10-23
•
Granted: 1953-07-14
•
Expires: 1970-10-23
Abstract
No abstract record available.
Inventors
- 👤 Paul A Marsal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:34
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/04; H01R39/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/49011; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF MANUFACTURING COMMUTATORS WHICH COMPRISES COAXIALLY ALIGNING WITHIN A CYLINDRICAL TUBE OF CARBON A BUSHING, THE OUTER DIAMETER OF SAID BUSHING BEING SMALLER THAN THE INNER DIAMETER OF THE CARBON TUBE, FILLING THE INTERSTICE BETWEEN THE BUSHING AND TUBE WITH A PHENOLFORMALDEHYDE CONDENSTATION RESIN AND SUBJECTING THE SAME TO HEAT AND PRESSURE UNTIL IT BECOMES INFUSIBLE, AFTER SAID RESIN HAS BEEN RENDERED INFUSIBLE, RADIALLY SLICING THROUGH THE CARBON TUBE IN A LONGITUDINALLY DIRECTION TO FORM THE COMMUTATOR SEGMENTS, POSITIONING A SUBSTANTIALLY ANNU-
Claim 2
Independent Claim
84 words
A METHOD OF MANUFACTURING COMMUTATORS WHICH COMPRISES COAXIALLY ALIGNING WITHIN A CYLINDRICAL TUBE OF CARBON A BUSHING, THE OUTER DIAMETER OF SAID BUSHING BEING SMALLER THAN THE INNER DIAMETER OF THE CARBON TUBE, FILLING THE INTERSTICE BETWEEN THE BUSHING AND TUBE WITH A PHENOLFORMALDEHYDE CONDENSTATION RESIN AND SUBJECTING THE SAME TO HEAT AND PRESSURE UNTIL IT BECOMES INFUSIBLE, AFTER SAID RESIN HAS BEEN RENDERED INFUSIBLE, RADIALLY SLICING THROUGH THE CARBON TUBE IN A LONGITUDINALLY DIRECTION TO FORM THE COMMUTATOR SEGMENTS, POSITIONING A SUBSTANTIALLY ANNU-
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 |