Patent US3528669A successfully refreshed from Google Patents.
US3528669A
Expired / Lapsed
US
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Sealing ring,more particularly for machine parts
Assignee: FIRGAT SNC
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Filing: 1966-07-25
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Granted: 1970-09-15
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Expires: 1986-07-25
Abstract
No abstract record available.
Inventors
- 👤 Carlo F Tondato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/328; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |