Patent US4717249A successfully refreshed from Google Patents.
US4717249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diving mask with auxiliary lens
Assignee: Individual
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Filing: 1986-06-06
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Granted: 1988-01-05
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Expires: 2006-06-06
Abstract
Abstract A prism lens attached to the window of a diving mask at a position laterally removed from the normal line of sight through the window and having a planar surface (22) and a spaced spherical surface (24) with a chord (26) of the spherical surface (24) disposed at an acute angle relative to the planar surface (22) for magnifying and bending the line of sight through the prism lens means (20) to allow viewing therethrough at an acute angle between the eye and prism lens means (20).
Inventors
- 👤 Bernard D. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
B; B63; B63C; B63C11/00; B63C11/02; B63C11/12; G; G02; G02B; G02B23/00; G02B23/16; G02B23/22; G02C; G02C7/00; G02C7/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
116 words
A diving mask assembly (10) comprising: a face-engaging support means (12), a diving mask window (14) supported by said support means for viewing through said mask, said assembly characterized by: a prism lens means (20) attached to said window at a position laterally removed from the nomral line of sight through the window and having a planar surface (22) and a spaced spherical surface (24) with a chord (26) of the spherical surface (24) disposed at an acute angle relative to said planar surface (22) for magnifying and bending the line of sight through the prism lens means (20) to allow viewing therethrough at an acute angle between the eye and the prism lens means (20).
Claim 2
Dependent Claim
116 words
A diving mask assembly (10) comprising: a face-engaging support means (12), a diving mask window (14) supported by said support means for viewing through said mask, said assembly characterized by: a prism lens means (20) attached to said window at a position laterally removed from the nomral line of sight through the window and having a planar surface (22) and a spaced spherical surface (24) with a chord (26) of the spherical surface (24) disposed at an acute angle relative to said planar surface (22) for magnifying and bending the line of sight through the prism lens means (20) to allow viewing therethrough at an acute angle between the eye and the prism lens means (20).
Claim 3
Dependent Claim
23 words
An assembly as set forth in claim 1 further characterized by said planar surface (22) being circular and secured to said window (14).
Claim 4
Dependent Claim
31 words
An assembly as set forth in claim 2 further characterized by said exterior of said prism lens means (20) being cylindrical between said planar surface (22) and said spherical surface (24).
Claim 5
Dependent Claim
17 words
An assembly as set forth in claim 3 further characterized by said spherical surface (24) being convex.
Claim 6
Dependent Claim
25 words
A prism lens (20) as set forth in claim 4 further characterized by said prism lens (20) being adhesively attached to said mask window (14).
Claim 7
Dependent Claim
24 words
A prism lens (20) set forth in claim 5 further characterized by said adhesive being a clear transparent glue or any other suitable adhesive.
Claim 8
Dependent Claim
38 words
A diving mask assembly as set forth in claim 6 further characterized by said face-engaging support means (12) including a window support frame (16) and a strap (18) for holding said face-engaging means (12) to a wearer's face.
Claim 9
Dependent Claim
102 words
A prism lens (20) for attachment to a window of a diving mask at a position laterally removed from the normal line of sight through the mask, said prism lens means (20) comprising a planar surface (22), and a spherical surface (24) spaced from said planar surface (22), said spherical surface (24) having a chord (26) disposed at an acute angle relative to said planar surface (22) for magnifying and bending the line of sight through the prism lens to allow viewing therethrough at an acute angle relative to the normal line of sight between the eye and the prism lens (20).
Claim 10
Dependent Claim
102 words
A prism lens (20) for attachment to a window of a diving mask at a position laterally removed from the normal line of sight through the mask, said prism lens means (20) comprising a planar surface (22), and a spherical surface (24) spaced from said planar surface (22), said spherical surface (24) having a chord (26) disposed at an acute angle relative to said planar surface (22) for magnifying and bending the line of sight through the prism lens to allow viewing therethrough at an acute angle relative to the normal line of sight between the eye and the prism lens (20).
Claim 11
Dependent Claim
19 words
A prism lens (20) as set forth in claim 8 further characterized by said planar surface (22) being circular.
Claim 12
Dependent Claim
30 words
A prism lens (20) as set forth in claim 9 further characterized by said prism lens (20) being cylindrical between said prism lens surface (22) and said spherical surface (24).
Claim 13
Dependent Claim
19 words
A prism lens (20) as set forth in claim 10 further characterized by said spherical surface (24) being convex.
References Cited (Backward Citations)
GB783315A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |