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US3588134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston bearing
Assignee: Automatic Sprinkler Corp
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Filing: 1969-09-25
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Granted: 1971-06-28
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Expires: 1989-09-25
Abstract
Abstract A BEARING FOR PISTONS AND THE LIKE INCLUDING SYNTHETIC PLASTIC MATERIAL FORMING THE OUTER BEARING SURFACE OVER A GENERALLY RING-SHAPED SUPPORTING MEMBER OF METAL. THE SUPPORTING MEMBER INCLUDES A SERIES OF STUDLIKE PROJECTIONS ON EACH AXIAL END FACE THEREOF, AND THE OUTER SURFACE OF THE PRO- JECTIONS ARE FLUSH WITH THE BEARING AXIAL END FACES DEFINED BY THE PLASTIC MATERIAL.
Inventors
- 👤 Ward Sievenpiper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:16
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |