Patent US3339931A successfully refreshed from Google Patents.
US3339931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable gasket with wick
Assignee: WR Grace and Co
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Filing: 1964-12-31
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Granted: 1967-09-05
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Expires: 1984-12-31
Abstract
No abstract record available.
Inventors
- 👤 Donald D Hundt
- 👤 Gavin Francis Paul
- 👤 John W Lefforge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:38
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN INFLATABLE GASKET ADAPTED TO SEAL JOINT BETWEEN A PAIR OF MATING MEMBERS COMPRISING A HOLLOW SHEATH FORMED OF A RESISTANT, FLEXIBLE AND DISTORTABLE RUBBER MATERIAL, A WICK FORMED OF CAPILLARY-ACTIVE SUBSTANCE ENCLOSED WITHIN THE SHEATH, THE SAID WICK BEING COEXTENSIVE WITH AT LEAST ONE MAJOR INTERIOR WALL AREA OF SAID SHEATH, THE WICK OCCUPYING AT LEAST 8% OF THE HOLLOW INTERIOR OF SAID SHEATH, THE CAPILLARY CAPACITY OF THE SAID WICK HOLDING AND MAINTAINING IN UNIFORM DISTRIBUTION A QUANTITY OF A RESIN ACTIVATOR SUFFICIENT TO CAUSE THE HARDENING OF THAT QUANTITY OF A LIQUID RESIN NECESSARY TO INFLATE THE GASKET TO JOINT-SEALING DIMENSIONS, AND A SEALABLE PASSAGE CONNECTING THE INTERIOR OF SAID SHEATH WITH THE EXPOSED EXTERIOR OF THE GASKET.
Claim 2
Dependent Claim
121 words
AN INFLATABLE GASKET ADAPTED TO SEAL JOINT BETWEEN A PAIR OF MATING MEMBERS COMPRISING A HOLLOW SHEATH FORMED OF A RESISTANT, FLEXIBLE AND DISTORTABLE RUBBER MATERIAL, A WICK FORMED OF CAPILLARY-ACTIVE SUBSTANCE ENCLOSED WITHIN THE SHEATH, THE SAID WICK BEING COEXTENSIVE WITH AT LEAST ONE MAJOR INTERIOR WALL AREA OF SAID SHEATH, THE WICK OCCUPYING AT LEAST 8% OF THE HOLLOW INTERIOR OF SAID SHEATH, THE CAPILLARY CAPACITY OF THE SAID WICK HOLDING AND MAINTAINING IN UNIFORM DISTRIBUTION A QUANTITY OF A RESIN ACTIVATOR SUFFICIENT TO CAUSE THE HARDENING OF THAT QUANTITY OF A LIQUID RESIN NECESSARY TO INFLATE THE GASKET TO JOINT-SEALING DIMENSIONS, AND A SEALABLE PASSAGE CONNECTING THE INTERIOR OF SAID SHEATH WITH THE EXPOSED EXTERIOR OF THE GASKET.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |