US3938655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable stiffener for spectacle cases
Assignee: MASTER SPECIALTY PRODUCTS
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Filing: 1974-09-09
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Granted: 1976-02-17
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Expires: 1994-09-09
Abstract
Abstract A removable stiffener for slip-in spectacle cases is formed by bending a sheet of resilient metal into a U-shaped structure approximating the cross-section of the spectacle case and lined on its internal concave surface with a soft, non-abrasive material. The stiffener is manually compressed prior to insertion into the spectacle case and is retained therein by the friction developed between its external surface and the inner walls of the case, due to its restrained expansion. The insert stiffens the case and prevents damage to the eyeglasses carried therein.
Inventors
- 👤 Abraham Romolt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:42
CPC Classifications
A; A45; A45C; A45C11/00; A45C11/04; A45F; A45F5/00; A45F5/1541
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A two-piece spectacle case comprising in combination: an elongated tubular outer sheath of flexible material having one end thereof open to receive a pair of spectacles inserted axially into said sheath coaxially therewith; and an elongated longitudinally rigid stiffener removably disposed within said sheath and defining a spectacle-receiving channel of generally U-shaped cross-section having opposed, spaced, resiliently connected front and rear walls, said stiffener being inserted slidingly into said sheath axially through said open end with the walls of said stiffener spaced apart a certain distance and exerting an outwardly directed force against said sheath to maintain said sheath in substantial conformity with the cross-sectional shape of said spectacles.
Claim 2
Dependent Claim
109 words
A two-piece spectacle case comprising in combination: an elongated tubular outer sheath of flexible material having one end thereof open to receive a pair of spectacles inserted axially into said sheath coaxially therewith; and an elongated longitudinally rigid stiffener removably disposed within said sheath and defining a spectacle-receiving channel of generally U-shaped cross-section having opposed, spaced, resiliently connected front and rear walls, said stiffener being inserted slidingly into said sheath axially through said open end with the walls of said stiffener spaced apart a certain distance and exerting an outwardly directed force against said sheath to maintain said sheath in substantial conformity with the cross-sectional shape of said spectacles.
Claim 3
Dependent Claim
25 words
A two-piece spectacle case as described in claim 1, wherein said stiffener comprises a sheet of resilient material permanently formed with said generally U-shaped cross-section.
Claim 4
Dependent Claim
80 words
A two-piece spectacle case as described in claim 2, wherein: said sheath comprises spaced front and rear panels, said panels being joined along all but a portion of their adjacent edges to define an elongated tube having one end thereof open, the front and rear walls of said channel conform generally to said front and rear panels, respectively; and said stiffener is formed with said front and rear walls normally spaced apart more widely than said front and rear panels.
Claim 5
Dependent Claim
19 words
A two-piece spectacle case as described in claim 3, wherein said stiffener engages said spectacles in frictional contact therewith.
Claim 6
Dependent Claim
35 words
A two-piece spectacle case as described in claim 4, wherein said stiffener is lined with a yielding nonabrasive material, whereby spectacles in said case are protected from abrasive contact with said front and rear walls.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |