US3915352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aerosol can and piston assembly
Assignee: Individual
•
Filing: 1974-09-11
•
Granted: 1975-10-28
•
Expires: 1994-09-11
Abstract
Abstract A cylindrical can having a longitudinal seam presenting higher and lower inwardly projecting portions, and a piston within the can having at least three external ribs. The spacing between each two successive ribs is no greater than the length of one lower seam portion, and the spacing between two alternate ribs is greater than the length of one higher seam portion. The ribs may extend around the entire periphery of the piston or only a portion thereof. The top and side walls of the piston may be provided with inwardly projecting ridges.
Inventors
- 👤 Christian T Scheindel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:49
CPC Classifications
B; B65; B65D; B65D83/00; B65D83/14; B65D83/60; B65D83/64
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
A can and piston assembly, comprising: a. a cylindrical can having a longitudinal seam projecting into the can interior from the inner surface of the can side wall, said seam having higher portions and lower portions alternating with each other along the length of said seam, and b. a cylindrical piston within said can having at least three external ribs extending transversely of said can seam and spaced apart along the length of said seam, the spacing between each two successive ones of said ribs being no greater than the length of one of said lower seam portions, and the spacing between any two of said ribs on opposite sides of a third rib being greater than the length of one of said higher seam portions.
Claim 2
Dependent Claim
126 words
A can and piston assembly, comprising: a. a cylindrical can having a longitudinal seam projecting into the can interior from the inner surface of the can side wall, said seam having higher portions and lower portions alternating with each other along the length of said seam, and b. a cylindrical piston within said can having at least three external ribs extending transversely of said can seam and spaced apart along the length of said seam, the spacing between each two successive ones of said ribs being no greater than the length of one of said lower seam portions, and the spacing between any two of said ribs on opposite sides of a third rib being greater than the length of one of said higher seam portions.
Claim 3
Dependent Claim
17 words
A can and piston assembly as defined in claim 1 wherein said piston has four external ribs.
Claim 4
Dependent Claim
39 words
A can and piston assembly as defined in claim 1 wherein said piston iS hollow and defined by a thin flexible side wall merging into a top wall, said ribs projecting from the exterior surface of said side wall.
Claim 5
Dependent Claim
41 words
A can and piston assembly as defined in claim 1 wherein said piston has a cylindrical side wall, and said ribs extend along only a portion of the periphery of said side wall, said side wall portion facing said can seam.
Claim 6
Dependent Claim
30 words
A can and piston assembly as defined in claim 1 wherein said piston has a cylindrical side wall, and said ribs extend along the entire periphery of said side wall.
Claim 7
Dependent Claim
38 words
A can and piston assembly as defined in claim 1 wherein said piston has an integral side and top wall formed of molded plastic, and a radially-extending ridge projecting from the interior surface of said piston top wall.
Claim 8
Dependent Claim
17 words
A can and piston assembly as defined in claim 6 including a plurality of said radially-extending ridges.
Claim 9
Dependent Claim
32 words
A can and piston assembly as defined in claim 6 including a downwardly-extending ridge projecting from the interior surface of said piston side wall, said downwardly-extending ridge merging into said radially-extending ridge.
Claim 10
Dependent Claim
27 words
A can and piston assembly as defined in claim 8 including a plurality of said radially-extending and downwardly-extending ridges, each radially-extending ridge merging into a downwardly-extending ridge.
References Cited (Backward Citations)
US3132570A
Cited
US3381863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |