US3630194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthopedic bandage
Assignee: Johnson and Johnson
•
Filing: 1970-05-22
•
Granted: 1971-12-28
•
Expires: 1990-05-22
Abstract
Abstract This orthopedic bandage for immobilizing or supporting portions of the body comprises a flexible carrier such as cotton gauge supporting a solid, water-soluble vinyl monomer selected from the group consisting of diacetone acrylamide and N-isopropyl acrylamide and mixtures thereof. Other monomers and fillers including polymeric and reactive substances may optionally be added to achieve particular properties or results. The bandage is preferably prepared for use by dipping in water in the presence of a catalyst for initiating polymerization of the vinyl monomer and then wrapping the body portion to be immobilized. In the preferred practice the initiator is a part of the bandage and may either be mixed with the monomer or coated on the surface of the bandage.
Inventors
- 👤 Franklin Boardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:55
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04; A61L; A61L15/00; A61L15/07; A61L15/12
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
24 words
The orthopedic bandage of claim 1 wherein said cast-forming composition includes about 20 to 60 percent by weight, based on total monomer, of N-t-butylacrylamide.
Claim 2
Dependent Claim
25 words
The orthopedic bandage of claim 1 wherein said cast-forming composition includes sufficient polymerization iniTiator to polymerize said water-soluble vinyl monomer in the presence of water.
Claim 3
Dependent Claim
18 words
The orthopedic bandage of claim 3 wherein said polymerization initiator comprises a mixture of oxidizing and reducing agents.
Claim 4
Dependent Claim
17 words
The orthopedic bandage of claim 3 wherein said polymerization initiator includes a buffer component to control acidity.
Claim 5
Dependent Claim
16 words
The orthopedic bandage of claim 3 wherein said polymerization initiator comprises ammonium persulfate and ferrous sulfate.
Claim 6
Dependent Claim
16 words
The orthopedic bandage of claim 3 wherein said polymerization initiator comprises ammonium persulfate and sodium sulfite.
Claim 7
Dependent Claim
17 words
The orthopedic bandage of claim 7 wherein said polymerization initiator includes a buffering quantity of sodium bicarbonate.
Claim 8
Dependent Claim
13 words
The orthopedic bandage of claim 3, including an encompassing, substantially moistureproof container therefor.
Claim 9
Dependent Claim
33 words
The orthopedic bandage of claim 1 wherein said cast-forming composition includes about 20 to 60 percent by weight, based on total monomer, of a nonirritating, solid monomeric derivative of acrylic and methacrylic acid.
Claim 10
Dependent Claim
26 words
The orthopedic bandage of claim 1 wherein said cast-forming composition includes up to about 70 percent by weight, based on said composition, of a solid filler.
Claim 11
Dependent Claim
14 words
The orthopedic bandage of claim 11 wherein said solid filler comprises a polymeric filler.
Claim 12
Dependent Claim
35 words
The orthopedic bandage of claim 11 wherein said solid filler is a water-soluble polymeric filler selected from the group consisting of poly (ethylene oxide), methyl cellulose, carboxymethyl cellulose, hydroxy ethyl cellulose polyacrylamide or mixtures thereof.
Claim 13
Dependent Claim
45 words
The orthopedic bandage of claim 11 wherein said solid filler is a water-insoluble polymeric filler selected from the group consisting of cellulose acetate, poly (methyl methacrylate), poly (diallyl phthalate), polycaprolactone, copolymers of ethylene and maleic anhydride, copolymers of styrene and maleic anhydride or mixtures thereof.
Claim 14
Dependent Claim
13 words
The orthopedic bandage of claim 12 wherein said polymeric filler comprises cellulose acetate.
Claim 15
Dependent Claim
14 words
The orthopedic bandage of claim 12 wherein said polymer filler comprises methyl methacrylate polymer.
Claim 16
Dependent Claim
14 words
The orthopedic bandage of claim 11 wherein said filler comprises a water-insoluble inorganic salt.
Claim 17
Dependent Claim
14 words
The orthopedic bandage of claim 17 wherein said water-insoluble inorganic salt comprises calcium sulfate.
Claim 18
Dependent Claim
14 words
The orthopedic bandage of claim 17 wherein said water-insoluble inorganic salt comprises calcium carbonate.
Claim 19
Dependent Claim
57 words
An orthopedic bandage comprising a flexible fabric carrier having adhered thereto a cast-forming composition comprising about 20 to 64 percent by weight, based on said composition, diacetone acrylamide, about 10 percent to 48 percent by weight, based on said composition, of N-t-butylacrylamide and about 20 to 50 percent by weight, based on said composition. of cellulose acetate.
Claim 20
Dependent Claim
21 words
The orthopedic bandage of claim 20 wherein said cast-forming composition includes a catalytic quantity of initiator for polymerizing said diacetone acrylamide.
Claim 21
Dependent Claim
45 words
A packaged orthopedic bandage comprising a substantially moistureproof container having enclosed therein a flexible fabric carrier having adhered thereto a dry cast-forming composition comprising at least about 9 percent by weight of diacetone acrylamide and a catalytic quantity of initiator for polymerizing said diacetone acrylamide.
Claim 22
Dependent Claim
15 words
The packaged orthopedic bandage of claim 22 wherein said container comprises an aluminum foil package.
Claim 23
Independent Claim
101 words
A method of forming a rigid orthopedic cast for body members comprising the steps of: a. providing an orthopedic bandage comprising a flexible fabric carrier supporting a dry, cast-forming composition comprising at least about 9 percent by weight of a solid, water-soluble vinyl monomer selected from the group consisting of diacetone acrylamide, N-isopropyl acrylamide, and mixtures thereof; b. immersing said bandage in a aqueous medium in the presence of a poLymerization initiator for said vinyl monomer; c. wrapping said orthopedic bandage in a plurality of layers around the body member to be immobilized; and d. allowing said vinyl monomer to polymerize.
Claim 24
Dependent Claim
18 words
The method of claim 24 wherein said polymerization initiator is present on said bandage prior to immersion 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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |