Patent US3348728A successfully refreshed from Google Patents.
US3348728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure vessels
Assignee: WR Grace and Co
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Filing: 1965-01-04
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Granted: 1967-10-24
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Expires: 1985-01-04
Abstract
No abstract record available.
Inventors
- 👤 Love Harold Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:07
CPC Classifications
F; F15; F15B; F15B1/00; F15B1/02; F15B1/04; F15B1/08; F15B1/10; F15B1/16; F15B1/165; F15B2201/00; F15B2201/20; F15B2201/205; F15B2201/30; F15B2201/315; F15B2201/3152; F15B2201/40; F15B2201/41; F15B2201/415; F15B2201/4155; F15B2201/60; F15B2201/615; F17; F17C; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A BLADDER FOR A PRESSURE VESSEL, SAID BLADDER BEING OF RESILIENT DEFORMABLE MATERIAL AND BEING CIRCULAR IN CROSS SECTION AND HAVING A PORT AT ONE END AXIALLY ALIGNED WITH THE LONGITUDINAL AXIS OF THE BLADDER, SAID PORT HAVING A THICKENED ANNULAR BEAD OF DIAMETER SMALLER THAN THE MAXIMUM CROSS SECTION DIAMETER OF SAID BLADDER, SAID BEAD HAVING A RIGID MEMBER REMOVABLY POSITIONED THEREIN.
Claim 2
Dependent Claim
63 words
A BLADDER FOR A PRESSURE VESSEL, SAID BLADDER BEING OF RESILIENT DEFORMABLE MATERIAL AND BEING CIRCULAR IN CROSS SECTION AND HAVING A PORT AT ONE END AXIALLY ALIGNED WITH THE LONGITUDINAL AXIS OF THE BLADDER, SAID PORT HAVING A THICKENED ANNULAR BEAD OF DIAMETER SMALLER THAN THE MAXIMUM CROSS SECTION DIAMETER OF SAID BLADDER, SAID BEAD HAVING A RIGID MEMBER REMOVABLY POSITIONED THEREIN.
References Cited (Backward Citations)
US2792022A
Cited
US3113592A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |