US4093490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making vaginal diaphragm
Assignee: Ortho Pharmaceutical Corp
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Filing: 1977-04-29
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Granted: 1978-06-06
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Expires: 1997-04-29
Abstract
Abstract This invention relates to an improved method of making a vaginal diaphragm. The diaphragm of the present invention is prepared from thermoplastic elastomers by means of injection molding.
Inventors
- 👤 George A. Ziets
- 👤 Bernard L. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:01
CPC Classifications
A; A61; A61F; A61F6/00; A61F6/06; A61F6/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
The method of making a diaphragm comprising center injection molding a rim from a thermoplastic elastomer, deforming a sheet of a thermoplastic elastomer into a dome at an elevated temperature, said sheet having a diameter greater than said ring, and sealing said dome to said ring, whereby a diaphragm is formed having a continuous rim integral with a flexible dome-shaped membrane.
Claim 2
Independent Claim
61 words
The method of making a diaphragm comprising center injection molding a rim from a thermoplastic elastomer, deforming a sheet of a thermoplastic elastomer into a dome at an elevated temperature, said sheet having a diameter greater than said ring, and sealing said dome to said ring, whereby a diaphragm is formed having a continuous rim integral with a flexible dome-shaped membrane.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the rim is heat sealed to the dome.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein vacuum is applied during the sealing step.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein pressure is applied during the sealing step.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein the rim and dome are comprised of the same thermoplastic elastomer.
Claim 7
Dependent Claim
16 words
The method of claim 1 wherein the rim and dome are comprised of different thermoplastic elastomers.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein the rim and dome comprise a thermoplastic polyurethane having a Shore A hardness of between 50-90.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-06-05 | 1981-12-05 | 1982-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-05 | 1985-12-05 | 1986-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-05 | 1989-12-05 | 1990-06-06 | $7700.00 | Window Closed / Lapsed |