US3255028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing of paper materials
Assignee: Kelco Co
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Filing: 1961-08-09
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Granted: 1966-06-07
•
Expires: 1981-08-09
Abstract
No abstract record available.
Inventors
- 👤 William P Fairchild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:05
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/21; D21H17/24; D21H17/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A SURFACE SIZING COMPOSITION ADAPTED TO PAPER TREATMENT TO IMPROVE THE WATER IMPERMEABILITY PROPERTIES THEREOF COMPRISING WATER, FROM 2% TO 18% BY WEIGHT OF STARCH, AN ALKALI METAL ALGINATE IN AN AMOUNT WITHIN THE RANGE OF 1/20 TO 1/2 OF THE WEIGHT OF SAID STARCH, AND SODIUM ALUMINATE IN THE PROPORTION OF 1/8 TO 1/3 OF THE WEIGHT OF SAID ALKALI METAL ALGINATE.
Claim 2
Dependent Claim
63 words
A SURFACE SIZING COMPOSITION ADAPTED TO PAPER TREATMENT TO IMPROVE THE WATER IMPERMEABILITY PROPERTIES THEREOF COMPRISING WATER, FROM 2% TO 18% BY WEIGHT OF STARCH, AN ALKALI METAL ALGINATE IN AN AMOUNT WITHIN THE RANGE OF 1/20 TO 1/2 OF THE WEIGHT OF SAID STARCH, AND SODIUM ALUMINATE IN THE PROPORTION OF 1/8 TO 1/3 OF THE WEIGHT OF SAID ALKALI METAL ALGINATE.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |