Patent US3271037A successfully refreshed from Google Patents.
US3271037A
Expired / Lapsed
US
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Pressure-balanced segmental packing rings
Assignee: Garlock Inc
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Filing: 1963-04-01
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Granted: 1966-09-06
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Expires: 1983-04-01
Abstract
No abstract record available.
Inventors
- 👤 Frank E Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:53
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/441
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |