US2885318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet strength cellulosic web and method of making the same
Assignee: Wyeth Holdings LLC
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Filing: 1956-07-11
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Granted: 1959-05-05
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Expires: 1976-07-11
Abstract
No abstract record available.
Inventors
- 👤 Jen Yun
- 👤 Sewell T Moore
- 👤 Suen Tzeng Jiueq
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:20
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/49
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A CELLULOSE WEB OF IMPROVED WET AND DRY STRENGTH COMPOSED OF CELLULOSIC FIBERS BONDED TOGETHER BYA CONTENT OF 0.05% TO 5%, BASED ON THE DRY WEIGHT OF THE FIBERS, OF A NORMALLY WATER-SOLUBLE THERMOSETTING POLY(N-METHYLOLCARBAMYL) POLYALKYLENEPOLYAMINE RESIN IN THERMO-CURED FORM, THE METHYLOLCARBAMYL GROUPS OF SAID RESIN BEFORE CONVERSION TO THERMO-CURED FORM HAVING THE THEORETICAL FORMULA
Claim 2
Dependent Claim
55 words
A CELLULOSE WEB OF IMPROVED WET AND DRY STRENGTH COMPOSED OF CELLULOSIC FIBERS BONDED TOGETHER BYA CONTENT OF 0.05% TO 5%, BASED ON THE DRY WEIGHT OF THE FIBERS, OF A NORMALLY WATER-SOLUBLE THERMOSETTING POLY(N-METHYLOLCARBAMYL) POLYALKYLENEPOLYAMINE RESIN IN THERMO-CURED FORM, THE METHYLOLCARBAMYL GROUPS OF SAID RESIN BEFORE CONVERSION TO THERMO-CURED FORM HAVING THE THEORETICAL FORMULA
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |