Patent US5272930B1 successfully refreshed from Google Patents.
US5272930B1
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Mechanical element having a shaft pressure-fitted into an engaging member and its manufacturing method
Assignee: Nippon Piston Ring Co Ltd
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Filing: 1992-06-05
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Granted: 1997-09-23
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Expires: 2012-06-05
Abstract
No abstract record available.
Inventors
- 👤 Yoshikatsu Nakamura
- 👤 Yasukichi Egami
- 👤 Shunsuke Takeguchi
- 👤 Ken Akimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:45
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/064; F16D1/072; B; B21; B21D; B21D53/00; B21D53/84; B21D53/845; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F16H; F16H53/00; F16H53/02; F16H53/025; F01L2001/0475; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49293; Y10T29/49462; Y10T29/49465; Y10T403/00; Y10T403/49; Y10T403/4966; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/21; Y10T74/2101
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) | 2000-09-22 | 2001-03-24 | 2001-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-22 | 2005-03-24 | 2005-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-22 | 2009-03-24 | 2009-09-23 | $7700.00 | Window Closed / Lapsed |