Patent US3725314A successfully refreshed from Google Patents.
US3725314A
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Rubber reclamation using ultrasonic energy
Assignee: Citgo Petroleum Corp
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Filing: 1971-06-25
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Granted: 1973-04-03
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Expires: 1991-06-25
Abstract
Abstract A process for dissolving solid rubber articles such as tires into a liquid vehicle which comprises contacting the rubber while immersed in the liquid with a source of ultrasonic energy whereby the bulk rubber effectively disintegrates upon contact and dissolves into the liquid.
Inventors
- 👤 A Pelofsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:48
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J11/20; C08J3/00; C08J3/02; C08J3/09; C08J3/11; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S241/00; Y10S241/31
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
15 words
The method of claim 1 wherein said liquid hydrocarbon is a suitable solvent for rubber.
Claim 2
Dependent Claim
13 words
The method of claim 2 wherein said liquid hydrocarbon is an aromatic hydrocarbon.
Claim 3
Dependent Claim
18 words
The method of claim 2 wherein said liquid hydrocarbon is a hydrocarbon feedstock suitable for producing carbon black.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein said ultrasonic irradiation is in the range of about 20 kilohertz and at a power density of about 100 watts per square centimeter.
Claim 5
Dependent Claim
23 words
The method of claim 5 wherein a mixture of the rubber and the liquid hydrocarbon is passed through the source of ultrasonic energy.
References Cited (Backward Citations)
US3084020A
Cited
US3301810A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |