US3358749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interfacial surface generator and method of preparation thereof
Assignee: Dow Chemical Co
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Filing: 1966-07-22
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Granted: 1967-12-19
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Expires: 1986-07-22
Abstract
No abstract record available.
Inventors
- 👤 Douglas S Chisholm
- 👤 Jr Turner Alfrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/10; F28D7/103; B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/433; F28F; F28F1/00; F28F1/10; F28F1/42; F28F1/424; F28F1/426; F28D21/00; F28D2021/0019; F28D2021/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
AN INTERFACIAL SURFACE GENERATOR COMPRISING A HOLLOW TUBULAR CONDUIT DEFINING AN INTERNAL LONGITUDINAL PASSAGEWAY, THE CONDUIT HAVING A WALL, THE WALL DEFINING A PLURALITY OF OPPOOSED CRIMPS, THE CRIMPS BEING DISPOSED IN ANGULAR RELATIONSHIP TO THE LONGITUDINAL AXIS OF THE CONDUIT AND FORMING AN ANGLE THEREWITH SUBSTANTIALLY LESS THAN 90* AND BEING IN ANGULAR OPPOSITION TO EACH OTHER, THE CRIMPS HAVING TROUGHS, A PORTION OF EACH OF THE TROUGHS OF OPPOSED CRIMPS BEING IN CLOSELY ADJACENT RELATIONSHIP, THE OPPOSED PAIRS OF CRIMPS BEING OF ALTERNATING RIGHT HANDED AND LEFT HANDED CONFIGURATION, THE RIGHT HANDED AND LEFT HANDED CRIMPS BEING DISPOSED GENERALLY IN PLANES WHICH CONTAIN THE LONGITUDINAL AXIS OF THE CONDUIT, THE PLANE OF THE TROUGHS OF THE RIGHT HANDED CRIMPS BEING DISPOSED IN ANGULAR RELATIONSHIP TO THE PLANE AT THE LEFT HANDED CRIMPS.
Claim 2
Dependent Claim
134 words
AN INTERFACIAL SURFACE GENERATOR COMPRISING A HOLLOW TUBULAR CONDUIT DEFINING AN INTERNAL LONGITUDINAL PASSAGEWAY, THE CONDUIT HAVING A WALL, THE WALL DEFINING A PLURALITY OF OPPOOSED CRIMPS, THE CRIMPS BEING DISPOSED IN ANGULAR RELATIONSHIP TO THE LONGITUDINAL AXIS OF THE CONDUIT AND FORMING AN ANGLE THEREWITH SUBSTANTIALLY LESS THAN 90* AND BEING IN ANGULAR OPPOSITION TO EACH OTHER, THE CRIMPS HAVING TROUGHS, A PORTION OF EACH OF THE TROUGHS OF OPPOSED CRIMPS BEING IN CLOSELY ADJACENT RELATIONSHIP, THE OPPOSED PAIRS OF CRIMPS BEING OF ALTERNATING RIGHT HANDED AND LEFT HANDED CONFIGURATION, THE RIGHT HANDED AND LEFT HANDED CRIMPS BEING DISPOSED GENERALLY IN PLANES WHICH CONTAIN THE LONGITUDINAL AXIS OF THE CONDUIT, THE PLANE OF THE TROUGHS OF THE RIGHT HANDED CRIMPS BEING DISPOSED IN ANGULAR RELATIONSHIP TO THE PLANE AT THE LEFT HANDED CRIMPS.
References Cited (Backward Citations)
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US2663321A
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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) | 1970-12-18 | 1971-06-19 | 1971-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-18 | 1975-06-19 | 1975-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-18 | 1979-06-19 | 1979-12-19 | $7700.00 | Window Closed / Lapsed |