Patent US5069403A successfully refreshed from Google Patents.
US5069403A
Expired / Lapsed
US
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Drag reduction article
Assignee: 3M Co
•
Filing: 1990-05-02
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Granted: 1991-12-03
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Expires: 2010-05-02
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
2026-10-24 20:06
CPC Classifications
B; B64; B64C; B64C21/00; B64C21/02; B64C21/04; B64C21/10; 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: 11
Claim 1
Independent Claim
62 words
A method for providing a drag reduction article comprising the steps of applying a layer of a first radiation curable composition to a carrier, forming a first patterned surface on said radiation curable composition, curing said first radiation curable composition by exposure to activating radiation to provide a first cured patterned surface capable of reducing drag resistance when a fluid flow thereacross.
Claim 2
Independent Claim
62 words
A method for providing a drag reduction article comprising the steps of applying a layer of a first radiation curable composition to a carrier, forming a first patterned surface on said radiation curable composition, curing said first radiation curable composition by exposure to activating radiation to provide a first cured patterned surface capable of reducing drag resistance when a fluid flow thereacross.
Claim 3
Dependent Claim
27 words
A method according to claim 1 wherein said first patterned surface is formed by contacting said radiation curable composition to a negative of said first patterned surface.
Claim 4
Dependent Claim
25 words
A method according to claim 2 wherein said curing takes place while said first radiation curable composition contacts said negative of said first patterned surface.
Claim 5
Dependent Claim
54 words
A method according to claim 1 wherein said first cured patterned surface is covered with a layer of a second radiation curable composition and said second radiation curable composition is cured by exposure to activating radiation to form a second radiation-cured layer and said second radiation-cured layer is removed from said first patterned surface.
Claim 6
Dependent Claim
16 words
A method according to claim 4 wherein said steps of covering, curing and removing are repeated.
Claim 7
Dependent Claim
14 words
A method according to claim 4 wherein said second radiation curable composition comprises polyurethane.
Claim 8
Dependent Claim
15 words
A method according to claim 6 wherein said polyurethane is cured by exposure to heat.
Claim 9
Dependent Claim
16 words
A method according to claim 1 wherein said first radiation curable composition comprises a urethane-acrylate copolymer.
Claim 10
Dependent Claim
17 words
A method according to claim 8 wherein said urethane-acrylate copolymer is cured by exposure to electromagnetic radiation.
Claim 11
Dependent Claim
13 words
A method according to claim 9 wherein said electromagnetic radiation comprises ultraviolet light.
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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) | 1994-12-02 | 1995-06-03 | 1995-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-02 | 1999-06-03 | 1999-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-02 | 2003-06-03 | 2003-12-03 | $7700.00 | Window Closed / Lapsed |