Patent US4148952A successfully refreshed from Google Patents.
US4148952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable blocks formed of shredded paper-like material
Assignee: Papakube Corp
•
Filing: 1974-10-21
•
Granted: 1979-04-10
•
Expires: 1994-10-21
Abstract
Abstract A stable block is formed of shredded paper or paper-like material (herein after referred to as "paper") and a binder such as ligninsulfonate. The block is formed by shredding paper, mixing the shreds with a binder such as ligninsulfonate resin, and placing the same in a heated matrix of a die; and while in the die, subjecting the mixture to high pressure.
Inventors
- 👤 Gerald B. Nelson
- 👤 William J. Prindle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:41
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/08; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/64; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A block comprising: a plurality of fragments of paper packed tightly together in a stable and homogeneous form and capable of being shredded to form a homogeneous mass; a water soluble binder having properties of adhering the fragments of paper into the stable and homogeneous form upon an application of heat and pressure to the binder and the fragments, the water soluble binder being included for holding said fragments of paper in closely packed relationship in the stable and homogeneous form; said block being rigid and stable until being shredded to form the homogeneous mass; and a binder included in the stable block in a percentage by weight in the order of one-half percent (1/2%) to three percent (3%).
Claim 2
Dependent Claim
119 words
A block comprising: a plurality of fragments of paper packed tightly together in a stable and homogeneous form and capable of being shredded to form a homogeneous mass; a water soluble binder having properties of adhering the fragments of paper into the stable and homogeneous form upon an application of heat and pressure to the binder and the fragments, the water soluble binder being included for holding said fragments of paper in closely packed relationship in the stable and homogeneous form; said block being rigid and stable until being shredded to form the homogeneous mass; and a binder included in the stable block in a percentage by weight in the order of one-half percent (1/2%) to three percent (3%).
References Cited (Backward Citations)
US1812969A
Cited
US3403074A
Cited
US3664076A
Cited
US3654048A
Cited
US3718536A
Cited
US3763621A
Cited
US3736221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |