US3251709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sized cellulosic paper
Assignee: Monsanto Co
•
Filing: 1965-06-11
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Granted: 1966-05-17
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Expires: 1985-06-11
Abstract
No abstract record available.
Inventors
- 👤 Francis A Bonzagni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/41; D21H17/42; D21H17/43; D21H19/00; D21H19/10; D21H19/14; D21H19/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31801; Y10T428/31804; Y10T428/31808
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A CELLULOSIC PAPER SHEET COMPRISED OF A WAX COATING DEPOSITED ON AT LEAST ONE SIDE OF A SIZED CELLULOSIC PAPER SUBSTRATE WHEREIN THE SIZING COMPOSITION IS SELECTED FROM THE GROUP CONSISTING OF (A) 95-40 PARTS OF A STYRENE MALEIC ANHYDRIDE COPOLYMER AND, CORRESPONDINGLY, 5-60 PARTS OF A POLYVINYL ALCOHOL AND (B) THE AMMONIUM, AMINE AND ALKALI METAL SALT OF (A); WHEEIN THE STYRENE MALEIC ANHYDRIDE COPOLYMER HAS A SPECIFIC VISCOSITY OF 2-5 AND THE POLYVINYL ALCOHOL HAS A VISCOSITY OF 40-60 CENTIPOISES AT 20*C.
Claim 2
Dependent Claim
84 words
A CELLULOSIC PAPER SHEET COMPRISED OF A WAX COATING DEPOSITED ON AT LEAST ONE SIDE OF A SIZED CELLULOSIC PAPER SUBSTRATE WHEREIN THE SIZING COMPOSITION IS SELECTED FROM THE GROUP CONSISTING OF (A) 95-40 PARTS OF A STYRENE MALEIC ANHYDRIDE COPOLYMER AND, CORRESPONDINGLY, 5-60 PARTS OF A POLYVINYL ALCOHOL AND (B) THE AMMONIUM, AMINE AND ALKALI METAL SALT OF (A); WHEEIN THE STYRENE MALEIC ANHYDRIDE COPOLYMER HAS A SPECIFIC VISCOSITY OF 2-5 AND THE POLYVINYL ALCOHOL HAS A VISCOSITY OF 40-60 CENTIPOISES AT 20*C.
References Cited (Backward Citations)
US2306046A
Cited
US2609350A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-16 | 1969-11-15 | 1970-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-16 | 1973-11-15 | 1974-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-16 | 1977-11-15 | 1978-05-17 | $7700.00 | Window Closed / Lapsed |