Patent US3351693A successfully refreshed from Google Patents.
US3351693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing electrical insulating structures
Assignee: Westinghouse Electric Corp
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Filing: 1964-02-14
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Granted: 1967-11-07
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Expires: 1984-02-14
Abstract
No abstract record available.
Inventors
- 👤 Landis E Feather
- 👤 Ralph C Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:42
CPC Classifications
H; H01; H01F; H01F5/00; H01F5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF PREPARING ELECTRICAL INSULATING MATERIAL, COMPRISING THE STEPS OF CUTTING A BLANK HAVING PREDETERMINED DIMENSIONS FROMA SHEET OF INSULATING MATAERIAL OF PREDETERMINED THICKNESS, CORRUGATING SAID BLANK TO FORM A PLURALITY OF SPACED PARALLEL FIRST INDENTATIONS HAVING A UNIFORM DEPTH WHICH INCREASES THE EFFECTIVE THICKNESS OF SAID BLANK BY SUBSTANTIALLY FIFTY PERCETN AND WHICH SHORTENS A PREDETERMINED DIMENSION OF SAID BLANK, AND CORRUGATING SAID BLANK TO FORM A PLURALITY OF SPACED PARALLEL SECOND INDENTATIONS HAVING A UNIFORM DEPTH SUBSTANTIALLY LESS THAN THE DEPTH OF SAID FIRST INDENTATIONS, SAID SECOND IN-
Claim 2
Independent Claim
91 words
A METHOD OF PREPARING ELECTRICAL INSULATING MATERIAL, COMPRISING THE STEPS OF CUTTING A BLANK HAVING PREDETERMINED DIMENSIONS FROMA SHEET OF INSULATING MATAERIAL OF PREDETERMINED THICKNESS, CORRUGATING SAID BLANK TO FORM A PLURALITY OF SPACED PARALLEL FIRST INDENTATIONS HAVING A UNIFORM DEPTH WHICH INCREASES THE EFFECTIVE THICKNESS OF SAID BLANK BY SUBSTANTIALLY FIFTY PERCETN AND WHICH SHORTENS A PREDETERMINED DIMENSION OF SAID BLANK, AND CORRUGATING SAID BLANK TO FORM A PLURALITY OF SPACED PARALLEL SECOND INDENTATIONS HAVING A UNIFORM DEPTH SUBSTANTIALLY LESS THAN THE DEPTH OF SAID FIRST INDENTATIONS, SAID SECOND IN-
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |