US3621847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arcuate core for sanitary napkins with a water soluble carboxymethyl cellulose binder
Assignee: Procter and Gamble Co
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Filing: 1967-12-20
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Granted: 1971-11-23
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Expires: 1987-12-20
Abstract
Abstract A SANITARY NAPKIN HAVING AN ARCUATELY CONFIGURED CORE CONTAINING A WATER-SOLUBLE BINDER DISTRIBUTED UNIFORMLY THROUGHOUT. THE BINDER CONSISTS ESSENTIALLY OF THE SODIUM SALT OF CARBOXYMETHYLCELLULOSE HAVING A DEGREE OF SUBSTITUTION OF AT LEAST 0.4 AND BEING PRESENT IN SPECIFIED RANGES IN ACCORDANCE WITH THE WEIGHT OF THE CORE. THE BINDER HAS A MEDIUM TO A HIGH VISCOSITY SUCH THAT WHEN DISSOLVED IN WATER TO FORM A 1% SOLUTION AT 75*F., THE VISCOSITY OF THE SOLUTION WILL BE IN THE RANGE OF FROM ABOUT 25 TO ABOUT 2000 CP.
Inventors
- 👤 John P Roberson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:58
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/539; A61F13/15203; A61F13/15211; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61F13/45; A61F13/47; A61F13/472; A61F13/51; A61F13/511; A61F13/56; A61F13/64; A61F13/15577; A61F2013/15821; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/530182; A61F2013/5694
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |