US3469855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing devices for sealing the passage of a piston rod through a wall
Assignee: Werkspoor NV
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Filing: 1967-01-26
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Granted: 1969-09-30
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Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jannes Enting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:27
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/053; F02G1/0535; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F25; F25B; F25B9/00; F25B9/002; F25B9/004; F02G2253/00; F02G2253/03
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) | 1972-09-29 | 1973-03-31 | 1973-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-29 | 1977-03-31 | 1977-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-29 | 1981-03-31 | 1981-09-30 | $7700.00 | Window Closed / Lapsed |