Patent US4181758A successfully refreshed from Google Patents.
US4354879A
Expired / Lapsed
US
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Utilization of fibrous waste
Assignee: Individual
•
Filing: 1981-01-21
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Granted: 1982-10-19
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Expires: 2001-01-21
Abstract
Abstract A board or similar product is made from fibrous spent hops, the resin content of which sets the product. The product is preferably formed by catalyzed hot-pressing.
Inventors
- 👤 Gerald J. L. Griffin
- 👤 Adrian J. Emck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:02
CPC Classifications
C; C08; C08L; C08L97/00; C08L97/02; C08L99/00; C12; C12F; C12F3/00; C12F3/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
43 words
A board or solid product made from fibrous material compacted with a settable binder characterised in that the fibrous material consists essentially of raw hop waste which is fibrous in character and contains natural resin which provides at least part of the binder.
Claim 2
Dependent Claim
43 words
A board or solid product made from fibrous material compacted with a settable binder characterised in that the fibrous material consists essentially of raw hop waste which is fibrous in character and contains natural resin which provides at least part of the binder.
Claim 3
Dependent Claim
20 words
A product as claimed in claim 1 wherein the natural resin from the hop waste provides substantially all the binder.
Claim 4
Dependent Claim
34 words
A method of manufacturing a product as claimed in claim 1 or claim 2 which comprises a hot-pressing step wherein, prior to said step, a curing or setting catalyst is added to the waste.
Claim 5
Dependent Claim
16 words
A method as claimed in claim 3 wherein the catalyst is suitable for setting carbonyl compounds.
Claim 6
Dependent Claim
12 words
A method as claimed in claim 4 wherein the catalyst is hexamine.
Claim 7
Dependent Claim
21 words
A fiber board comprising compressed hop fiber bonded together with a binder comprising resin naturally occurring in the said hop fiber.
Claim 8
Dependent Claim
21 words
A fiber board comprising compressed hop fiber bonded together with a binder comprising resin naturally occurring in the said hop fiber.
Claim 9
Dependent Claim
52 words
A process for making a fiber board which comprises pressing a fibrous material containing hop fiber which contains from about 1% to about 10% by weight of moisture and from about 3% to about 4% of a natural occurring resin under a pressure whereby the fibrous material becomes compacted into a board.
Claim 10
Dependent Claim
52 words
A process for making a fiber board which comprises pressing a fibrous material containing hop fiber which contains from about 1% to about 10% by weight of moisture and from about 3% to about 4% of a natural occurring resin under a pressure whereby the fibrous material becomes compacted into a board.
Claim 11
Dependent Claim
8 words
The product of the process of claim 7.
References Cited (Backward Citations)
GB2025432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |