US3932192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper coating material containing pullulan
Assignee: Hayashibara Seibutsu Kagaku Kenkyujo KK
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Filing: 1974-09-24
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Granted: 1976-01-13
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Expires: 1994-09-24
Abstract
Abstract A coating material obtained by incorporating into a paper coating material pullulan, which is a linear high polymer having repetition units, bonded through alpha -1,6 linkages, of maltotriose, a trimer of glucose, and is represented by the formula, WHEREIN N REPRESENTS THE POLYMERIZATION DEGREE AND IS AN INTEGER OF 20 TO 10,000, IS EXCELLENT IN SUCH PROPERTIES AS GLOSS, PRINTING GLOSS, ADHESIVE STRENGTH, AND VISCOSITY STABILITY DURING STORAGE.
Inventors
- 👤 Seizo Nakashio
- 👤 Noriyuki Sekine
- 👤 Nobuhiro Toyota
- 👤 Fumio Fujita
- 👤 Masahiro Domoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:48
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
26 words
A paper-coating composition comprising pullulan and at least one pigment selected from the group consisting of clay, calcium carbonate, titanium dioxide, satin white and aluminum hydroxide.
Claim 2
Dependent Claim
26 words
A paper-coating composition comprising pullulan and at least one pigment selected from the group consisting of clay, calcium carbonate, titanium dioxide, satin white and aluminum hydroxide.
Claim 3
Dependent Claim
18 words
A paper-coating composition according to claim 1, wherein the molecular weight of said pullulan is 10,000 to 5,000,000.
Claim 4
Dependent Claim
29 words
A paper-coating composition according to claim 1, wherein the amount of said pullulan is 0.1 to 99% by weight based on the total solid content of the coating composition.
References Cited (Backward Citations)
US3784390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |