Patent US3490774A successfully refreshed from Google Patents.
US3490774A
Expired / Lapsed
US
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Packing for a reciprocal plunger rod
Assignee: Dresser Rand Co
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Filing: 1966-03-29
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Granted: 1970-01-20
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Expires: 1986-03-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Henry
- 👤 John A Marino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:46
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441; F04; F04B; F04B39/00; F04B39/04; F04B39/041; F16J15/16; F16J15/26; F16J15/28; F16J15/56
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) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |