Coated tampon
Abstract
Abstract A water-soluble, thermoplastic compound especially suitable for hygienic and medical applications, such as for use as an insertion aid coating for tampons and as the matrix structure for suppositories. The compound is composed of a thermoplastic, filmforming water-soluble polymer and a compatible plasticizer for the polymer. The preferred polymer is hydroxypropyl cellulose. The preferred plasticizer is an olefinic glycol of predetermined molecular weight. One example of a preferred plasticizer is polyethylene glycol having a molecular weight of less than about 1,500. Another example of a preferred plasticizer is propylene glycol and polymers thereof below a molecular weight of about 750. These compounds are thermoplastic and may be cast, thermoformed, hot melt dip coated, or transfer molded.
Inventors
- 👤 D Hanke
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |