Patent US3661154A successfully refreshed from Google Patents.
US3661154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-absorbing material
Assignee: GOLDFARB KENNETH S
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Filing: 1969-05-26
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Granted: 1972-05-09
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Expires: 1989-05-26
Abstract
Abstract A sheet which is a blend of water-insoluble fibers and pieces of film of a dry material which converts to a gel quickly on contact with a large amount of water. The blend is formed by suspending the fibers and film pieces in air. The sheet is useful in structures designed for absorbing body fluids, e.g. disposable diapers.
Inventors
- 👤 David Torr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/15577
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
16 words
Process as in claim 1 in which said particles are pieces of film of said material.
Claim 2
Dependent Claim
11 words
Process as in claim 1 in which said particles comprise starch.
Claim 3
Dependent Claim
20 words
Process as in claim 1 in which said humidification is effected by injecting a current of steam into said blend.
Claim 4
Dependent Claim
27 words
Process as in claim 4 in which the steam injection is such as to cause the surfaces of said particles to become adhesive without destroying their integrity.
Claim 5
Dependent Claim
11 words
Process as in claim 5 in which said particles comprise guar.
References Cited (Backward Citations)
US1702530A
Cited
US2600882A
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US3055369A
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US3078849A
Cited
US3073309A
Cited
US3344789A
Cited
US3386442A
Cited
US3386441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |