US4997609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer bonding grains of sand to form useful objects
Assignee: Individual
•
Filing: 1990-04-30
•
Granted: 1991-03-05
•
Expires: 2010-04-30
Abstract
Abstract A method of making useful objects by coating grains of sand with a thin film of sugar. Preparing a polymer mix of granulated plastic containers. Mixing the coated sand with the granulated plastic and placing the sand, resin mix in a mould and heating to 160° C. to 300° C. Applying sufficient pressure to force the air from the mould allowing the hot resin liquid to bond to the coated surface of the grains of sand. The mould and contents are cooled and the useful object removed.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
B; B29; B29C; B29C67/00; B29C67/24; B29C67/242; B29C67/243; B29C43/00; B29C43/006; C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08K; C08K9/00; C08K9/08; B29K; B29K2105/00; B29K2105/25; B29K2105/251; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S264/00; Y10S264/911; Y10S264/918
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
A method of making useful objects from a mixture of granulated discarded thermoplastics and sand by the steps of, placing a sugar coating on the surface of the sand particles, mixing the granulated thermoplastic and coated sand, placing the granulated thermoplastic and sand in a mould, applying sufficient heat to soften the thermoplastic, allowing the thermoplastic to adhere to the surface of the coated sand particles, applying sufficient pressure to remove the air from within the mould, removing the useful moulded object from the mould.
Claim 2
Independent Claim
85 words
A method of making useful objects from a mixture of granulated discarded thermoplastics and sand by the steps of, placing a sugar coating on the surface of the sand particles, mixing the granulated thermoplastic and coated sand, placing the granulated thermoplastic and sand in a mould, applying sufficient heat to soften the thermoplastic, allowing the thermoplastic to adhere to the surface of the coated sand particles, applying sufficient pressure to remove the air from within the mould, removing the useful moulded object from the mould.
Claim 3
Independent Claim
100 words
A method of making useful objects from a mixture of granulated thermoplastic resins and sand by the steps of, placing a coating of sugar on the surface of the sand particles, mixing the granulated thermoplastic and sugar coated sand, placing the granulated thermoplastic and sand mixture in a mould, applying sufficient heat to caramelize the sugar coating present on the sand particles and soften the thermoplastic resins, applying sufficient pressure to remove the air from within the mould, allowing the heated thermoplastic to adhere to the surface of the coated sand particles, removing the useful moulded object from the mould.
Claim 4
Independent Claim
100 words
A method of making useful objects from a mixture of granulated thermoplastic resins and sand by the steps of, placing a coating of sugar on the surface of the sand particles, mixing the granulated thermoplastic and sugar coated sand, placing the granulated thermoplastic and sand mixture in a mould, applying sufficient heat to caramelize the sugar coating present on the sand particles and soften the thermoplastic resins, applying sufficient pressure to remove the air from within the mould, allowing the heated thermoplastic to adhere to the surface of the coated sand particles, removing the useful moulded object from the mould.
Claim 5
Dependent Claim
24 words
A method as in claim 1 wherein the mould and useful object are allowed to cool before removing the useful object from the mould.
Claim 6
Dependent Claim
24 words
A method as in claim 2 wherein the mould and useful object are allowed to cool before removing the useful object from the mould.
References Cited (Backward Citations)
US3897527A
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US3671615A
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US3804935A
Cited
US3956541A
Cited
US4115497A
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US4225640A
Cited
US4279790A
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US4681719A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-04 | 1994-09-03 | 1995-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-04 | 1998-09-03 | 1999-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-04 | 2002-09-03 | 2003-03-05 | $7700.00 | Window Closed / Lapsed |