US3165228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base for pressure vessels
Assignee: Pressed Steel Tank Co
•
Filing: 1962-02-05
•
Granted: 1965-01-12
•
Expires: 1982-02-05
Abstract
No abstract record available.
Inventors
- 👤 Milton F Kroesch
- 👤 Willert O Kugler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:18
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/08; F17C13/084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METAL PRESSURE VESSEL HAVING AN OUTWARDLY CONVEX BOTTOM THE EXTERNAL SURFACE OF WHICH IS CHARACTERIZED BY AN ETCHED PORTION, A BOTTOM MEMBER COMPRISING A GENERALLY CIRCULAR DISK OF POLYVINYL CHLORIDE PLASTIC CONFORMING WITH AND ATTACHED TO SAID ETCHED PORTION OF SAID CONVEX BOTTOM, THE INTERFACE BETWEEN SAID CONVEX BOTTOM, AND A DISK CHARACTERIZED BY PORTIONS OF SAID PLASTIC BOTTOM MEMBER INTERMINGLED WITH SAID CONVEX BOTTOM, AND A POLYVINYL PRIMER DISPERSED THERETHROUGH TO FORM AN ADHERENT, INTERLOCKING BOND BETWEEN SAID BOTTOM MEMBER AND SAID CONVEX BOTTOM, SAID PLASTIC BOTTOM MEMBER COVERING SUBSTANTIALLY THE ENTIRE BOTTOM AREA OF SAID VESSEL AND BEING PROVIDED WITH AXIALLY PROJECTING SUPPORT MEANS ARRANGED GENERALLY CONCENTRIC WITH THE LONGITUDINAL AXIS OF SAID CYLINDER AND DEFINING A PLANAR SUPPORTING SURFACE LYING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID VESSEL.
Claim 2
Dependent Claim
136 words
A METAL PRESSURE VESSEL HAVING AN OUTWARDLY CONVEX BOTTOM THE EXTERNAL SURFACE OF WHICH IS CHARACTERIZED BY AN ETCHED PORTION, A BOTTOM MEMBER COMPRISING A GENERALLY CIRCULAR DISK OF POLYVINYL CHLORIDE PLASTIC CONFORMING WITH AND ATTACHED TO SAID ETCHED PORTION OF SAID CONVEX BOTTOM, THE INTERFACE BETWEEN SAID CONVEX BOTTOM, AND A DISK CHARACTERIZED BY PORTIONS OF SAID PLASTIC BOTTOM MEMBER INTERMINGLED WITH SAID CONVEX BOTTOM, AND A POLYVINYL PRIMER DISPERSED THERETHROUGH TO FORM AN ADHERENT, INTERLOCKING BOND BETWEEN SAID BOTTOM MEMBER AND SAID CONVEX BOTTOM, SAID PLASTIC BOTTOM MEMBER COVERING SUBSTANTIALLY THE ENTIRE BOTTOM AREA OF SAID VESSEL AND BEING PROVIDED WITH AXIALLY PROJECTING SUPPORT MEANS ARRANGED GENERALLY CONCENTRIC WITH THE LONGITUDINAL AXIS OF SAID CYLINDER AND DEFINING A PLANAR SUPPORTING SURFACE LYING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE LONGITUDINAL AXIS OF SAID VESSEL.
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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) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |