US4202803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber composition containing ground graminaceous rice product especially for manufacturing molded panels
Assignee: Individual
•
Filing: 1978-06-20
•
Granted: 1980-05-13
•
Expires: 1998-06-20
Abstract
Abstract A composition for the manufacture of a vulcanized rubber includes, in addition to elastomers, vulcanizing agents, anti-ageing agents and other known additives, a filler comprising finely-divided, dry waste products from the extraction of grain from cereal crops, such as stalks, husks and chaff and particularly rice chaff.
Inventors
- 👤 Teresio Signoretto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:07
CPC Classifications
C; C08; C08L; C08L7/00; C08L21/00; C08L97/00; C08L97/02; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/31504; Y10T428/31826; Y10T428/31841
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
47 words
In a composition for the manufacture of a vulcanized rubber for manufacturing a moulded panel including an elastomer and a vulcanizing agent, the improvement wherein the composition further includes as a filler, at least one member selected from the group consisting of rice husks and rice chaff.
Claim 2
Dependent Claim
47 words
In a composition for the manufacture of a vulcanized rubber for manufacturing a moulded panel including an elastomer and a vulcanizing agent, the improvement wherein the composition further includes as a filler, at least one member selected from the group consisting of rice husks and rice chaff.
Claim 3
Dependent Claim
20 words
A composition as in claim 1, wherein said filler results from the threshing of the grain heads of said rice.
Claim 4
Dependent Claim
12 words
A composition as in claim 1, wherein said filler is rice chaff.
Claim 5
Dependent Claim
29 words
A composition as in claim 1, wherein said filler is included in quantities of from 0.1 to 5 times the total weight of the other substances in said composition.
Claim 6
Dependent Claim
27 words
A composition as in claim 1, further including one of the following substances which are known per se: an anti-ageing agent; a plasticizer; a deodorant; a dye.
Claim 7
Dependent Claim
126 words
A composition as in claim 1, consisting essentially of the following substances mixed in the following proportions by weight: ______________________________________
Components Parts by weight
______________________________________
natural rubber 30 to 70
synthetic rubber 30 to 70
zinc oxide 3 to 8
sulphur 2 to 8
accelerants 0.5 to 3
anti-ageing agents
0.5 to 2
stearic acid 0.5 to 2
Further additives
dye 0-10% by weight of the total
weight of said components
deodorant 0-5% by weight of the total
weight of said components
fireproofing agent
0-10% by weight of the total
weight of said components
at least one finely-divided
0.1 to 5 times the total
filler selected from the
weight of the components
group consisting of rice
and further additives
husks and rice chaff
listed above.
______________________________________
Claim 8
Dependent Claim
98 words
A composition as in claim 6, consisting essentially of the following substances mixed in the following proportions by weight: ______________________________________
Components Parts by weight
______________________________________
natural rubber 50
synthetic rubber 50
zinc oxide 5
sulphur 4
accelerants 1.3
anti-ageing agent
1
stearic acid 1
Further additives
deodorant 1% by weight of the
total weight of said components
fireproofing agent
2% by weight of the total
weight of said components
at least one finely-divided
3 times the total weight
filler selected from the
of the above components and
group consisting of rice
further additives.
husks and rice chaff
______________________________________
Claim 9
Dependent Claim
10 words
A vulcanised rubber made from the composition of claim 1.
Claim 10
Dependent Claim
12 words
A composition as in claim 1, wherein said filler is rice husks.
References Cited (Backward Citations)
US2414803A
Cited
US2585219A
Cited
US3379662A
Cited
JPS4820773B1
Cited
JPS4820774B1
Cited
JPS4820775B1
Cited
US3867250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-13 | 1983-11-12 | 1984-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-13 | 1987-11-12 | 1988-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-13 | 1991-11-12 | 1992-05-13 | $7700.00 | Window Closed / Lapsed |