Patent US4583851A successfully refreshed from Google Patents.
Patent US3738615A successfully refreshed from Google Patents.
US3738615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interfacial surface generator
Assignee: Dow Chemical Co
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Filing: 1971-11-08
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Granted: 1973-06-12
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Expires: 1991-11-08
Abstract
Abstract Mixing or flow diverting elements are maintained within a plastic lined pipe by introducing a fluid under pressure between the casing of the pipe and the plastic lining.
Inventors
- 👤 W Brasie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:06
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A flow diverter unit, the unit comprising a conduit, the conduit having a rigid outer casing and inner and outer surfaces, a synthetic resinous thermoplastic liner disposed within the conduit and coextensive with the inner surface of the conduit the liner having inner and outer surfaces, a passage wiThin the rigid outer casing extending from the outer surface of the casing to the inner surface of the casing, at least one flow diverter disposed within the conduit within the liner thereof, a fluid under pressure disposed between the outer casing and the liner, that fluid being present in sufficient quantity to at least frictionally engage the flow diverter within the conduit.
Claim 2
Dependent Claim
111 words
A flow diverter unit, the unit comprising a conduit, the conduit having a rigid outer casing and inner and outer surfaces, a synthetic resinous thermoplastic liner disposed within the conduit and coextensive with the inner surface of the conduit the liner having inner and outer surfaces, a passage wiThin the rigid outer casing extending from the outer surface of the casing to the inner surface of the casing, at least one flow diverter disposed within the conduit within the liner thereof, a fluid under pressure disposed between the outer casing and the liner, that fluid being present in sufficient quantity to at least frictionally engage the flow diverter within the conduit.
Claim 3
Dependent Claim
16 words
The flow diverter unit of claim 1 wherein the flow diverter is an interfacial surface generator.
Claim 4
Dependent Claim
18 words
The flow diverter unit of claim 1 wherein a plurality of flow diverters is disposed within the passage.
Claim 5
Dependent Claim
17 words
The flow diverter unit of claim 1 wherein the flow diverter has a generally cylindrical outer surface.
Claim 6
Dependent Claim
18 words
The flow diverter unit of claim 4 wherein the flow diverter defines an outwardly facing generally annular recess.
Claim 7
Independent Claim
77 words
A method for the preparation of a flow diverting unit, the steps of the method comprising providing a conduit, the conduit comprising an outer rigid casing and an inner synthetic resinous thermoplastic lining generally coextensive with an inner surface of the conduit, disposing within the conduit at least one flow diverting element applying fluid pressure between the rigid outer casing and the thermoplastic liner sufficient to deform the liner to frictionally engage the flow diverting element therein.
Claim 8
Independent Claim
77 words
A method for the preparation of a flow diverting unit, the steps of the method comprising providing a conduit, the conduit comprising an outer rigid casing and an inner synthetic resinous thermoplastic lining generally coextensive with an inner surface of the conduit, disposing within the conduit at least one flow diverting element applying fluid pressure between the rigid outer casing and the thermoplastic liner sufficient to deform the liner to frictionally engage the flow diverting element therein.
Claim 9
Dependent Claim
18 words
The method of claim 6 including the step of including a plurality of flow diverters within the conduit.
Claim 10
Dependent Claim
13 words
The method of claim 7 wherein the flow diverters are interfacial surface generators.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |