US3116199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-laid web
Assignee: FMC Corp
•
Filing: 1961-07-19
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Granted: 1963-12-31
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Expires: 1981-07-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Mamerto M Cruz
- 👤 Robert L Mcdowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:02
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/02; D21H13/04; D21H17/00; D21H17/63; D21H17/64; D21H17/65; D21H17/66; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A METHOD OF PRODUCING WATER-LAID, FIBROUS PRODUCTS FROM DISPERSINS CONTAINING SYNTHETIC, HOMOGENEOUS, HYDROPHILIC FIBROUS BINDERS FORMED OF A WATER-INSOLUBLE, ALKALI-SOLUBLE CARBOXYALKYL CELLULOSE ETHER HAVING A DEGREE OF SUBSTITUTION OF FROM ABOUT 0.10 TO ABOUT 0.60, THE STEP OF SHEETING THE FIBERS OF THE DISPERSION TO FORM A WATERLAID FIBROUS PRODUCT FROM A DISPERSIN HAVING A PH ABOVE SUBSTANTIALLY NEUTRAL PH BUT NOT EXCEEDING ABOUT PH 10.5.
Claim 2
Dependent Claim
67 words
IN A METHOD OF PRODUCING WATER-LAID, FIBROUS PRODUCTS FROM DISPERSINS CONTAINING SYNTHETIC, HOMOGENEOUS, HYDROPHILIC FIBROUS BINDERS FORMED OF A WATER-INSOLUBLE, ALKALI-SOLUBLE CARBOXYALKYL CELLULOSE ETHER HAVING A DEGREE OF SUBSTITUTION OF FROM ABOUT 0.10 TO ABOUT 0.60, THE STEP OF SHEETING THE FIBERS OF THE DISPERSION TO FORM A WATERLAID FIBROUS PRODUCT FROM A DISPERSIN HAVING A PH ABOVE SUBSTANTIALLY NEUTRAL PH BUT NOT EXCEEDING ABOUT PH 10.5.
References Cited (Backward Citations)
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Cited
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Cited
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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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |