Patent US3132570A successfully refreshed from Google Patents.
US3132570A
Expired / Lapsed
US
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Piston construction for an aerosol container
Assignee: Primerica Inc
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Filing: 1960-10-18
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Granted: 1964-05-12
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Expires: 1980-10-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Henry Tice Hoffman
- 👤 Jackson John Mathews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:02
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/60; B65D83/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A FREE PISTON FOR ACTING ON CONFINED VISCOUS FLUIDS, COMPRISING AN ELONGATED TUBULAR BODY HAVING A THIN, FLEXIBLE WALL, AND A RIGID END WALL INTEGRAL WITH AND CLOSING ONE END OF SAID BODY TO FORM A UNITARY CUP-SHAPED CONFIGURATION THEREWITH, SAID END WALL BEING SUBSTANTIALLY THICKER THAN SAID BODY AND COMPRISING A FACE AND A PERIPHERAL ARCUATE PORTION WHICH MERGES WITH SAID FLEXIBLE BODY WALL IN A SUBSTANIALLY TANGENTIAL JUNCTURE AND EXTENDS RADIALLY INWARDLY THEREFROM WITH APPRECIABLE CURVATURE TOWARD THE AXIS OF SAID PISTON TO DEFINE A SMOOTH, CONTINUOUS FLOW CONTROL SURFACE.
Claim 2
Dependent Claim
92 words
A FREE PISTON FOR ACTING ON CONFINED VISCOUS FLUIDS, COMPRISING AN ELONGATED TUBULAR BODY HAVING A THIN, FLEXIBLE WALL, AND A RIGID END WALL INTEGRAL WITH AND CLOSING ONE END OF SAID BODY TO FORM A UNITARY CUP-SHAPED CONFIGURATION THEREWITH, SAID END WALL BEING SUBSTANTIALLY THICKER THAN SAID BODY AND COMPRISING A FACE AND A PERIPHERAL ARCUATE PORTION WHICH MERGES WITH SAID FLEXIBLE BODY WALL IN A SUBSTANIALLY TANGENTIAL JUNCTURE AND EXTENDS RADIALLY INWARDLY THEREFROM WITH APPRECIABLE CURVATURE TOWARD THE AXIS OF SAID PISTON TO DEFINE A SMOOTH, CONTINUOUS FLOW CONTROL SURFACE.
References Cited (Backward Citations)
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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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |