US4321038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braided gingival retraction cord
Assignee: Van R Dental Products Inc
•
Filing: 1980-07-18
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Granted: 1982-03-23
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Expires: 2000-07-18
Abstract
Abstract A gingival tissue retraction cord is provided which comprises a suitably dimensioned, moderately firm, flexible, multistrand, braided, absorbent cord impregnated with an effective amount of gingival tissue retraction material. The retraction cord is adapted to be inserted into the gingival sulcus to effect retraction of gingival tissue.
Inventors
- 👤 Don D. Porteous
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
A; A61; A61C; A61C9/00; A61C9/0033
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
26 words
A gingival tissue retraction cord comprising a suitably dimensioned, moderately firm, flexible, multistrand, braided, absorbent cord impregnated with an effective amount of gingival tissue retraction material.
Claim 2
Dependent Claim
26 words
A gingival tissue retraction cord comprising a suitably dimensioned, moderately firm, flexible, multistrand, braided, absorbent cord impregnated with an effective amount of gingival tissue retraction material.
Claim 3
Dependent Claim
43 words
The braided retraction cord of claim 1 wherein the braided strands comprise filling strands and warp strands with said filling strands successively passing over and then under adjacent warp strands and said warp strands successively passing over and then under adjacent filling strands.
Claim 4
Dependent Claim
16 words
The braided retraction cord of claim 2 which includes 4 warp strands and 4 filling strands.
Claim 5
Dependent Claim
14 words
The braided retraction cord of claim 2 which includes axially disposed support strand means.
Claim 6
Dependent Claim
21 words
The braided retraction cord of claim 4 which includes 4 warp strands, 4 filling strands and 3 axially disposed support strands.
Claim 7
Dependent Claim
65 words
The braided retraction cord of claim 1 wherein the braided strands comprise a plurality of pairs of filling strands and a plurality of pairs of warp strands with each of said pairs of filling strands successively passing over and then under adjacent pairs of warp strands and each of said pairs of warp strands successively passing over and then under adjacent pairs of filling strands.
Claim 8
Dependent Claim
14 words
The braided retraction cord of claim 6 which includes axially disposed support strand means.
Claim 9
Dependent Claim
25 words
The braided retraction cord of claim 7 which includes 4 pairs of warp strands, 4 pairs of filling strands and 1 axially disposed support strand.
Claim 10
Dependent Claim
20 words
The braided retraction cord of claim 1 wherein said cord has a diameter from about 0.015 to about 0.05 inch.
Claim 11
Dependent Claim
49 words
The braided retraction cord of claim 9 wherein said cord has from about 24 to about 60 picks per inch with the number of picks per inch being inversely proportional to the increasing diameter of the cord and being so selected as to provide a moderately firm, flexible cord.
Claim 12
Dependent Claim
17 words
The braided retraction cord of claim 9 wherein said cord has from 3 to about 24 strands.
Claim 13
Dependent Claim
21 words
The braided retraction cord of claim 1 wherein the gingival tissue retraction material is epinephrine, alum, aluminum chloride or mixtures thereof.
Claim 14
Independent Claim
34 words
A method for retracting gingival tissue which comprises inserting into the gingival sulcus a suitably dimensioned, moderately firm, flexible, absorbent, multistrand, braided, retraction cord impregnated with an effective amount of gingival tissue retraction material.
Claim 15
Independent Claim
34 words
A method for retracting gingival tissue which comprises inserting into the gingival sulcus a suitably dimensioned, moderately firm, flexible, absorbent, multistrand, braided, retraction cord impregnated with an effective amount of gingival tissue retraction material.
Claim 16
Dependent Claim
45 words
The method of claim 13 wherein the braided strands of the retraction cord comprise filling strands and warp strands with said filling strands successively passing over and then under adjacent warp strands and said warp strands successively passing over and then under adjacent filling strands.
Claim 17
Dependent Claim
18 words
The method of claim 14 wherein the braided retraction cord includes four warp strands and four filling strands.
Claim 18
Dependent Claim
16 words
The method of claim 14 wherein the braided retraction cord includes axially disposed support strand means.
Claim 19
Dependent Claim
23 words
The method of claim 16 wherein the braided retraction cord includes four warp strands, four filling strands and three axially disposed support strands.
Claim 20
Dependent Claim
63 words
The method of claim 13 wherein the braided strands comprise a plurality of pairs of filling strands and a plurality of pairs of warp strands with each of said pairs of filling strands successively passing over and then under adjacent pairs of warp strands and each of said pairs of warp strands successively passing over and then under adjacent pairs of filling strands.
Claim 21
Dependent Claim
16 words
The method of claim 18 wherein the braided retraction cord includes axially disposed support strand means.
Claim 22
Dependent Claim
27 words
The method of claim 19 wherein the braided retraction cord includes four pairs of warp strands, four pairs of filling strands and one axially disposed support strand.
Claim 23
Dependent Claim
20 words
The method of claim 13 wherein the braided retraction cord has a diameter from about 0.015 to about 0.05 inch.
Claim 24
Dependent Claim
49 words
The method of claim 21 wherein the braided retraction cord has from about 24 to about 60 picks per inch with the number of picks per inch being inversely proportional to the increasing diameter of the cord and being so selected as to provide a moderately firm, flexible cord.
Claim 25
Dependent Claim
17 words
The method of claim 21 wherein the braided retraction cord has from 3 to about 24 strands.
Claim 26
Dependent Claim
20 words
The method of claim 13 wherein the braided retraction cord is impregnated with epinephrine, alum, aluminum chloride or mixtures thereof.
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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) | 1985-03-22 | 1985-09-21 | 1986-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-22 | 1989-09-21 | 1990-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-22 | 1993-09-21 | 1994-03-23 | $7700.00 | Window Closed / Lapsed |