US2952874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ring for use in the manufacture of thermoplastic tubing
Assignee: Phillips Petroleum Co
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Filing: 1958-05-19
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Granted: 1960-09-20
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Doyle Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:49
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/885; B29C48/03; B29C48/09; B29C48/10; B29C48/911; B29C48/9115; B29C48/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
AN APPARATUS ADAPTED TO PROVIDE A SUBSTANTIALLY UNIFORM ANNULAR CONVERGING FLOW OF A GAS COMPRISING TWO ADJACENT AND CONCENTRIC, HOLLOW TORI CONNECTED BY AN ADJUSTABLE, ANNULAR FIRST ORIFICE, GAS INLET MEANS IN THE OUTER TORUS, A GAS PERVIOUS, HOLLOW RIGHT CYLINDER SUBSTANTIALLY BISECTING THE INNER TORUS IN A PLANE NORMAL TO THE PLANE OF REVOLUTION OF THE TORUS, A GAS IMPERVIOUS, HOLLOW RIGHT CYLINDER, WHOSE LATERIAL SURFACE AREA IS LESS THAN THAT OF THE GAS PERVIOUS CYLINDER AND GREATER THAN THE AREA OF THE ANNULAR FIRST ORIFICE, ADJUSTABLY POSITIONED BETWEEN SAID GAS PERVIOUS CYLINDER AND ANNULAR FIRST ORIFICE AND OUT OF CONTACT WITH THE WALLS OF SAID INNER TORUS, AN ANNULAR SECOND ORIFICE CONCENTRIC WILTH SAID TORI, AND AN ANNULAR PASSAGEWAY OF DIMINISHING VOLUME WITH RESPECT TO THE FLOW OF GAS CONNECTING SAID ANNULAR SECOND ORIFICE WITH THE INTERIOR OF SAID INNER TORUS.
Claim 2
Independent Claim
143 words
AN APPARATUS ADAPTED TO PROVIDE A SUBSTANTIALLY UNIFORM ANNULAR CONVERGING FLOW OF A GAS COMPRISING TWO ADJACENT AND CONCENTRIC, HOLLOW TORI CONNECTED BY AN ADJUSTABLE, ANNULAR FIRST ORIFICE, GAS INLET MEANS IN THE OUTER TORUS, A GAS PERVIOUS, HOLLOW RIGHT CYLINDER SUBSTANTIALLY BISECTING THE INNER TORUS IN A PLANE NORMAL TO THE PLANE OF REVOLUTION OF THE TORUS, A GAS IMPERVIOUS, HOLLOW RIGHT CYLINDER, WHOSE LATERIAL SURFACE AREA IS LESS THAN THAT OF THE GAS PERVIOUS CYLINDER AND GREATER THAN THE AREA OF THE ANNULAR FIRST ORIFICE, ADJUSTABLY POSITIONED BETWEEN SAID GAS PERVIOUS CYLINDER AND ANNULAR FIRST ORIFICE AND OUT OF CONTACT WITH THE WALLS OF SAID INNER TORUS, AN ANNULAR SECOND ORIFICE CONCENTRIC WILTH SAID TORI, AND AN ANNULAR PASSAGEWAY OF DIMINISHING VOLUME WITH RESPECT TO THE FLOW OF GAS CONNECTING SAID ANNULAR SECOND ORIFICE WITH THE INTERIOR OF SAID INNER TORUS.
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) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |