US4537187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earplug
Assignee: Individual
•
Filing: 1983-10-06
•
Granted: 1985-08-27
•
Expires: 2003-10-06
Abstract
Abstract An earplug particularly adapted for use by surfers and swimmers is provided having a small hole therein which keeps out water but which allows the user to hear, said plug being made of a soft plastic having a density of less than 1 whereby said plug will float.
Inventors
- 👤 Robert T. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
A; A61; A61F; A61F11/00; A61F11/06; A61F11/08; A61F11/085
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
111 words
An earplug having thin walls and having an external flange adapted to engage the pinna helix and tragus of the ear and with an inwardly extending conical portion adapted to fit into the concha and outer portion of the auditory canal, terminating in a rectangular knob with a flat substantially solid wall with a small hole in said wall, and with a small flange thereon, said knob sealing off the meatus of the external ear canal without substantially penetrating the external ear canal, said flange anchoring the plug at the entrance of the external ear canal, said plug being made of a soft plastic with a density of less than 1.
Claim 2
Dependent Claim
111 words
An earplug having thin walls and having an external flange adapted to engage the pinna helix and tragus of the ear and with an inwardly extending conical portion adapted to fit into the concha and outer portion of the auditory canal, terminating in a rectangular knob with a flat substantially solid wall with a small hole in said wall, and with a small flange thereon, said knob sealing off the meatus of the external ear canal without substantially penetrating the external ear canal, said flange anchoring the plug at the entrance of the external ear canal, said plug being made of a soft plastic with a density of less than 1.
Claim 3
Dependent Claim
18 words
The plug of claim 1 made of a styrene-rubber copolymer having a durometer hardness of about 43 A.
References Cited (Backward Citations)
SU320282A1
Cited
US2717596A
Cited
US2737953A
Cited
US2881759A
Cited
US3047089A
Cited
US3565069A
Cited
US3782379A
Cited
US4353364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |