Patent US3322433A successfully refreshed from Google Patents.
US3322433A
Expired / Lapsed
US
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Sealing ring and method of making same
Assignee: Minnesota Rubber and Plastics
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Filing: 1964-03-10
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Granted: 1967-05-30
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 John H Rentschler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:42
CPC Classifications
B; B65; B65D; B65D53/00; B65D53/02; B32; B32B; B32B27/00; F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/024; F16J15/06; F16J15/10; F16J15/104; F16J15/16; F16J15/32; F16J15/328
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A SEALING RING CONSTRUCTED PRINCIPALLY OF VULCANIZED SOLID ORGANIC CARBON CHAIN ELASTOMERIC MATERIAL AND HAVING AT LEAST ONE WORKING FACE, AND A HOMOGENEOUS COATING BONDED DIRECTLY TO SAID WORKING FACE AND COVERING THE SAME, SAID COATING BEING COMPRISED OF A PLYURETHANE RESIN HAVING AN ANTI-FRICTION FILLER OF LESS THAN 25% BY VOLUME THEREIN AND HAVING A RADIAL THICKNESS OF FROM 0.5 MIL TO 10 MIL, SAID COATING BEING COMPRISED OF A PLURALITY OF CURED LAMINATIONS OF SAID RESIN AND FILLER EACH LAMINATION OF WHICH IS NO GREATER THAN 3 MILS IN RADIAL THICKNESS.
Claim 2
Dependent Claim
93 words
A SEALING RING CONSTRUCTED PRINCIPALLY OF VULCANIZED SOLID ORGANIC CARBON CHAIN ELASTOMERIC MATERIAL AND HAVING AT LEAST ONE WORKING FACE, AND A HOMOGENEOUS COATING BONDED DIRECTLY TO SAID WORKING FACE AND COVERING THE SAME, SAID COATING BEING COMPRISED OF A PLYURETHANE RESIN HAVING AN ANTI-FRICTION FILLER OF LESS THAN 25% BY VOLUME THEREIN AND HAVING A RADIAL THICKNESS OF FROM 0.5 MIL TO 10 MIL, SAID COATING BEING COMPRISED OF A PLURALITY OF CURED LAMINATIONS OF SAID RESIN AND FILLER EACH LAMINATION OF WHICH IS NO GREATER THAN 3 MILS IN RADIAL THICKNESS.
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) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |