Patent US2968583A successfully refreshed from Google Patents.
US2968583A
Expired / Lapsed
US
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Capacitor sections and methods of making the same
Assignee: AT&T Inc
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Filing: 1957-04-25
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Granted: 1961-01-17
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Expires: 1977-04-25
Abstract
No abstract record available.
Inventors
- 👤 Eugene I Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:53
CPC Classifications
H; H01; H01G; H01G13/00; H01G13/06; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/20; H01B; H01B1/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12861; Y10T428/12896; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
THE METHOD OF MAKING CAPACITOR SECTIONS, WHICH COMPRISES THE STEPS OF PRECOOLING A ROLL OF POLYETHYLENE TEREPHTHALATE FILM HAVING A THICKNESS OF APPROXIMATELY 0.00025 INCH TO A TEMPERATURE OF APPROXIMATELY -40*F. IN A REFRIGERATING UNIT, REMOVING THE PRECOOLED ROLL FROM THE REFRIGERATING UNIT AND INSERTING THE SAME IN A METALLIZING UNIT WHICH NORMALLY OPERTES AT AN ABSOLUTE PRESSURE OF APPROXIMATELY 75 MICRONS OF MERCURY, UNROLLING THE FILM IN THE METALLIZING UNIT AT A SPEED OF THE ORDER OF 2500 FEET PER MINUTE, CONDENSING A MINUTE QUANTITY OF SILVER VAPOR ON A SURFACE OF THE FILM TO FORM A MOLECULAR LAYER OF CRYSTAL FORMING NUCLEI THEREON, CONDENSING ZINC VAPOR ON THE SILVERED SURFACE TO FORM A ZINC LAYER THEREON HAVING A THICKNESS OF APPROXIMATELY 0.000003 TO 0.000005 INCH, REWINDING THE METALLIZED FILM INTO A ROLL,
Claim 2
Independent Claim
134 words
THE METHOD OF MAKING CAPACITOR SECTIONS, WHICH COMPRISES THE STEPS OF PRECOOLING A ROLL OF POLYETHYLENE TEREPHTHALATE FILM HAVING A THICKNESS OF APPROXIMATELY 0.00025 INCH TO A TEMPERATURE OF APPROXIMATELY -40*F. IN A REFRIGERATING UNIT, REMOVING THE PRECOOLED ROLL FROM THE REFRIGERATING UNIT AND INSERTING THE SAME IN A METALLIZING UNIT WHICH NORMALLY OPERTES AT AN ABSOLUTE PRESSURE OF APPROXIMATELY 75 MICRONS OF MERCURY, UNROLLING THE FILM IN THE METALLIZING UNIT AT A SPEED OF THE ORDER OF 2500 FEET PER MINUTE, CONDENSING A MINUTE QUANTITY OF SILVER VAPOR ON A SURFACE OF THE FILM TO FORM A MOLECULAR LAYER OF CRYSTAL FORMING NUCLEI THEREON, CONDENSING ZINC VAPOR ON THE SILVERED SURFACE TO FORM A ZINC LAYER THEREON HAVING A THICKNESS OF APPROXIMATELY 0.000003 TO 0.000005 INCH, REWINDING THE METALLIZED FILM INTO A ROLL,
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |