US4986496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag reduction article
Assignee: 3M Co
•
Filing: 1985-05-31
•
Granted: 1991-01-22
•
Expires: 2005-05-31
Abstract
Abstract A conformable drag reduction article is provided having a patterned surface capable of reducing drag resistance by fluid flowing thereover.
Inventors
- 👤 Francis J. Marentic
- 👤 Terry L. Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:48
CPC Classifications
B; B64; B64C; B64C21/00; B64C21/10; B64C21/02; B64C21/04; B05; B05D; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; B05D5/00; B05D5/02; B29; B29C; B29C59/00; B29C59/02; B29C59/022; F; F15; F15D; F15D1/00; F15D1/002; F15D1/0025; F15D1/003; F15D1/0035; F15D1/004; A; A41; A41D; A41D2400/00; A41D2400/24; B05D1/00; B05D1/40; B05D1/42; B64C2230/00; B64C2230/26; Y; Y02; Y02E; Y02E10/00; Y02E10/70; Y02E10/72; Y02T; Y02T50/00; Y02T50/10; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24479; Y10T428/2457; Y10T428/24612; Y10T428/28; Y10T428/2813; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
An article capable of reducing the resistance to drag of a fluid flowing thereover, said article comprising a thermoset polymeric sheet formed in situ from the reaction product of an isocyanate with a polyol, said sheet having a first surface contacting said fluid, said first surface comprising a series of parallel peaks separated from one another by a series of parallel valleys.
Claim 2
Dependent Claim
62 words
An article capable of reducing the resistance to drag of a fluid flowing thereover, said article comprising a thermoset polymeric sheet formed in situ from the reaction product of an isocyanate with a polyol, said sheet having a first surface contacting said fluid, said first surface comprising a series of parallel peaks separated from one another by a series of parallel valleys.
Claim 3
Dependent Claim
21 words
An article according to claim 1 wherein said polyol is selected from the group consisting of polyester polyols and polyether polyols.
Claim 4
Dependent Claim
19 words
An article according to claim 1 wherein said polymeric sheet has an adhesive second surface for contacting a substrate.
Claim 5
Dependent Claim
27 words
An article according to claim 3 wherein said adhesive second surface is selected from the group consisting of heat activated adhesives, solvent activated adhesives, and pressure-sensitive adhesives.
Claim 6
Dependent Claim
16 words
An article according to claim 4 wherein said adhesive second surface comprises a pressure sensitive adhesive.
Claim 7
Dependent Claim
30 words
An article according to claim 5 wherein said pressure sensitive adhesive is selected from polyacrylate pressure sensitive adhesives, natural rubber pressure sensitive adhesives and rubbery block copolymer pressure sensitive adhesives.
Claim 8
Dependent Claim
16 words
An article according to claim 6 wherein pressure sensitive adhesive is a polyacrylate pressure sensitive adhesive.
Claim 9
Dependent Claim
26 words
An article according to claim 7 wherein said polyacrylate pressure sensitive adhesive comprises a polymer of an acrylate ester of acrylic acid with a non-tertiary alcohol.
Claim 10
Dependent Claim
29 words
An article according to claim 8 wherein said pressure sensitive adhesive comprises a polymer comprising 90 parts by weight 2-methyl butyl acrylate and 10 parts by weight acrylic acid.
Claim 11
Dependent Claim
16 words
An article according to claim 9 wherein said pressure sensitive adhesive is at least partially crosslinked.
Claim 12
Dependent Claim
17 words
An article according to claim 1 wherein said first surface has a symmetric saw tooth cross section.
Claim 13
Dependent Claim
7 words
A breathable article according to claim 11.
Claim 14
Dependent Claim
26 words
An article according to claim 12 wherein breath ability is provided by perforations in said article, said perforations having a diameter of less than 200 microns.
Claim 15
Dependent Claim
16 words
An article according to claim 13 wherein adhesive at the walls of said holes is detackified.
Claim 16
Dependent Claim
16 words
An article according to claim 13 wherein said perforations have a diameter of about 10 microns.
Claim 17
Dependent Claim
55 words
An article which, when applied to a substrate, reduces the drag caused when a fluid flows over the substrate, the article comprising a crosslinked, thermoset polymeric body comprising the reaction product of an isocyanate-functional material and a polyol-functional material, a patterned first surface on said body comprising a series of parallel, alternating peaks and valleys.
Claim 18
Dependent Claim
55 words
An article which, when applied to a substrate, reduces the drag caused when a fluid flows over the substrate, the article comprising a crosslinked, thermoset polymeric body comprising the reaction product of an isocyanate-functional material and a polyol-functional material, a patterned first surface on said body comprising a series of parallel, alternating peaks and valleys.
Claim 19
Dependent Claim
59 words
A sheet comprising a radiation-cured, thermoset polyurethane selected from the group consisting of polyester- and polyether-urethanes, said sheet having a series of parallel, alternating peaks and valleys on one surface thereof, said surface reducing the drag caused by a fluid flowing over a body when said sheet is applied to said body so that said surface contacts said fluid.
Claim 20
Dependent Claim
59 words
A sheet comprising a radiation-cured, thermoset polyurethane selected from the group consisting of polyester- and polyether-urethanes, said sheet having a series of parallel, alternating peaks and valleys on one surface thereof, said surface reducing the drag caused by a fluid flowing over a body when said sheet is applied to said body so that said surface contacts said fluid.
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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) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |