US3210087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radially contained packing having radially inner and outer sealing rings
Assignee: Gardner Denver Inc
•
Filing: 1962-02-01
•
Granted: 1965-10-05
•
Expires: 1982-02-01
Abstract
No abstract record available.
Inventors
- 👤 James R Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:25
CPC Classifications
E; E21; E21B; E21B21/00; E21B21/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A UNITARY PACKING RING COMPRISING GENERALLY CONCENTRIC RINGS INCLUDING RESILIENT INNER AND OUTER SEALING RINGS AND SUBSTANTIALLY RIGID INTERMEDIATE RING, SAID INNER AND OUTER RINGS BEING FIXEDLY AND SEALABLY ATTACHED TO THE OPPOSITE SIDE WALLS OF SAID INTERMEDIATE RING, THE LATTER HAVING OPPOSITE END SURFACES SEPARATING ADJACENT END SURFACES OF SAID INNER AND OUTER RINGS, AND SAID INNER RING INCLUDING A REDIALLY EXTENDING SEALING LIP AND AN AXIALLY BEYOND ONE OF SAID OPPOSITE END SURFACES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |