US4925671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone pressure sensitive adhesive and uses
Assignee: Flexcon Co Inc
•
Filing: 1984-07-07
•
Granted: 1990-05-15
•
Expires: 2004-07-07
Abstract
Abstract PCT No. PCT/US84/01068 Sec. 371 Date May 5, 1986 Sec. 102(e) Date May 5, 1986 PCT Filed Jul. 7, 1984 PCT Pub. No. WO86/00532 PCT Pub. Date Jan. 30, 1986.Pressure sensitive adhesive having favorable adhesive, shear, liquid permeability, and release characteristics. The adhesive is a crosslinked polymerization product of a methyl/phenyl siloxane gum, dimethyl siloxane gum and a polysiloxane resin. The resulting product provides suitable adhesion to a large number of surfaces and has particular utility as an adhesive between plastic film and human skin, especially for use with transdermal therapeutic devices. The adhesive characteristic mitigates damage to underlying surfaces such as human skin tissue during adhesive removal.
Inventors
- 👤 Herman Abber
- 👤 Elizabeth H. Gerry
- 👤 John R. Pennace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:34
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/70; A61K9/7023; A61K9/703; A61K9/7038; A61K9/7046; A61K9/7069; A61L; A61L15/00; A61L15/16; A61L15/20; A61L15/42; A61L15/58; A61L15/585; C; C08; C08L; C08L83/00; C09; C09J; C09J183/00; C09J183/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A combination of a medical device to be placed in adhesive contact with the skin and a pressure sensitive adhesive at least partially coated on said device, the adhesive permitting passage of medicinal liquids therethrough, said adhesive comprising a mixture of nitroglycerin and: the polymerization product of a mixture of reactants comprised of a linear methyl/phenyl polysiloxane gum, a linear dimethyl polysiloxane gum, and an MQ organopolysiloxane comprising monofunctional and quadrifunctional siloxane units, the adhesive permitting passage of nitroglycerin therethrough at substantially constant rate of at least 30 mg./hr./cm 2 as measured over a 27-hour period with the adhesive having a thickness of about 2.2±0.9 mil.
Claim 2
Dependent Claim
106 words
A combination of a medical device to be placed in adhesive contact with the skin and a pressure sensitive adhesive at least partially coated on said device, the adhesive permitting passage of medicinal liquids therethrough, said adhesive comprising a mixture of nitroglycerin and: the polymerization product of a mixture of reactants comprised of a linear methyl/phenyl polysiloxane gum, a linear dimethyl polysiloxane gum, and an MQ organopolysiloxane comprising monofunctional and quadrifunctional siloxane units, the adhesive permitting passage of nitroglycerin therethrough at substantially constant rate of at least 30 mg./hr./cm 2 as measured over a 27-hour period with the adhesive having a thickness of about 2.2±0.9 mil.
Claim 3
Dependent Claim
16 words
The combination of claim 1 wherein the medical device comprises a transdermal applicator for medicinal fluids.
Claim 4
Dependent Claim
13 words
The combination of claim 2 wherein the transdermal applicator comprises a semipermeable membrane.
Claim 5
Dependent Claim
18 words
The combination of claim 3 wherein the adhesive adheres to at least a portion of said semipermeable membrane.
Claim 6
Dependent Claim
42 words
A combination as in claim 1 wherein the adhesive has a thickness of at least 0.7 mil and permits at least 90 percent of the adhesive surface of the transdermal device in contact with the skin to remain adhesive after 24 hours.
Claim 7
Dependent Claim
24 words
A combination as in claim 1 wherein the adhesive has a peel adhesion from stainless steel of at least 570 gm. per inch width.
Claim 8
Dependent Claim
21 words
A combination as in claim 1 wherein the weight ratio of methyl/phenyl polysiloxane to dimethylpolysiloxane comprises between about 1/3 to 3/1.
References Cited (Backward Citations)
US2857356A
Cited
US3598122A
Cited
US3598122B1
Cited
US3652475A
Cited
US4039707A
Cited
US4016328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |