US3144371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
landolt
Assignee: —
•
Filing: —
•
Granted: 1964-08-11
•
Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:05
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32; B; B32; B32B; B32B38/00; B32B38/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A METHOD OF PRODUCING A DRY TYPE OF ELECTRIC CAPACITOR SUITABLE FOR ALTERNATING CURRENT APPLICATIONS COMPRISING WINDING A PAIR OF METALLIC FOIL ELECTRODES AND A PLURALITY OF POROUS DIELECTRIC LAYERS SO THAT SAID DIELECTRIC LAYERS ARE INTERLEAVED BETWEEN SAID ELECTRODES TO FORM A CAPACITOR ROLL, DRYING SAID ROLL TO REMOVE MOISTURE; IMPREGNATING SAID ROLL WITH A MIXTURE COMPRISING A MONOVINYL ARYL COMPOUND AND AT LEAST ONE POLYVINYL ARYL COMPOUND, SAID COMPOSITION CONTAIING A POLYMERIZATION CATALYST FROM .1 TO 1 PERCENT BY WEIGHT OF SAID COMPOSITION AND SAID CATALYST HAVING A DECOMPOSITION TEMPERATURE FROM 120 TO 180 DEGREES CENTIGRADE FOR A HALFLIFE OF 1 MINUTE TO 10 MINUTES; HEATING SAID CAPACITOR ROLL AT A TEMPERATURE FROM 150 TO 200 DEGREES CENTIGRADE TO ACTIVATE SAID CATALYST AND TO EFFECT A CROSSLINKING OF
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-11 | 1968-02-10 | 1968-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-11 | 1972-02-10 | 1972-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-11 | 1976-02-10 | 1976-08-11 | $7700.00 | Window Closed / Lapsed |