US3067088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making high wet-strength paper containing polymeric dialdehyde
Assignee: Individual
•
Filing: 1960-03-24
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Granted: 1962-12-04
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Expires: 1980-03-24
Abstract
No abstract record available.
Inventors
- 👤 Bernard T Hofreiter
- 👤 Hamerstrand George Earle
- 👤 Charles L Mehltretter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:28
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/28; C; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS OF PRODUCING PAPER OF HIGH WET STRENGTH FROM CELLULOSIC FIBERS, COMPRISING THE STEPS OF ADDING TO AN AQUEOUS SUSPENSION OF CELLULOSIC FIBERS AN AQUEOUS DISPERSION CONTAINING 0.5 TO 5 PERCENT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBERS OF A CATIONIC STARCH MEMBER SELECTED FROM THE GROUP CONSISTING OF A STARCH OF THE FORMULA
Claim 2
Dependent Claim
57 words
THE PROCESS OF PRODUCING PAPER OF HIGH WET STRENGTH FROM CELLULOSIC FIBERS, COMPRISING THE STEPS OF ADDING TO AN AQUEOUS SUSPENSION OF CELLULOSIC FIBERS AN AQUEOUS DISPERSION CONTAINING 0.5 TO 5 PERCENT BASED ON THE DRY WEIGHT OF THE CELLULOSIC FIBERS OF A CATIONIC STARCH MEMBER SELECTED FROM THE GROUP CONSISTING OF A STARCH OF THE FORMULA
References Cited (Backward Citations)
US2880236A
Cited
US2935436A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |