Patent US3935619A successfully refreshed from Google Patents.
US3935619A
Expired / Lapsed
US
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Grumment for sail cloth
Assignee: GAASTRA BV
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Filing: 1975-03-31
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Granted: 1976-02-03
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Expires: 1995-03-31
Abstract
Abstract A grumment for sail cloth in which two rings are positioned around the edge of a hole therein which edge has been ravelled and has a thermosetting adhesive smeared thereon and tightly clamped against the edge by a torus-shaped collar enclosing the rings.
Inventors
- 👤 Douwe Gaastra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:49
CPC Classifications
A; A44; A44B; A44B13/00; A44B13/0058; A44B13/0076; A44B13/0082; A43; A43C; A43C5/00; B; B63; B63H; B63H9/00; B63H9/04; B63H9/06; B63H9/067; Y; Y10; Y10T; Y10T24/00; Y10T24/37; Y10T24/3742; Y10T24/3745
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
A grummet assembly for use in a material, such as sail cloth or the like, comprising there being an opening in said material, the edge of said opening being ravelled and having a thermosetting adhesive smeared thereon; a first ring having an inner diameter substantially the same as said opening in contact with one side of said material at the edge of said opening; a second ring having an inner diameter substantially the same as said opening in contact with the other side of said material at the edge of said opening; a torus-shaped collar enclosing said rings and the edge of said opening so as to tightly clamp said edge between said rings.
Claim 2
Dependent Claim
114 words
A grummet assembly for use in a material, such as sail cloth or the like, comprising there being an opening in said material, the edge of said opening being ravelled and having a thermosetting adhesive smeared thereon; a first ring having an inner diameter substantially the same as said opening in contact with one side of said material at the edge of said opening; a second ring having an inner diameter substantially the same as said opening in contact with the other side of said material at the edge of said opening; a torus-shaped collar enclosing said rings and the edge of said opening so as to tightly clamp said edge between said rings.
Claim 3
Dependent Claim
55 words
A grummet assembly in accordance with claim 1 wherein each of said rings has a flat surface on one side and a rounded surface having a substantially circular cross-section on the opposite side, said one side further having a recess on the inner perimeter thereof, the edge of said material being received by said recess.
Claim 4
Dependent Claim
40 words
A grummet assembly in accordance with claim 2 wherein said recess has a first boundary surface parallel to the plane of the flat surface of said ring and a second boundary surface which tapers outwardly from said first boundary surface.
References Cited (Backward Citations)
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US3450810A
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US3512224A
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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) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |