Patent US2640035A successfully refreshed from Google Patents.
US2640035A
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US
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Nondiscoloring reclaim and process for preparation
Assignee: Wingfoot Corp
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Filing: 1951-01-06
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Granted: 1953-05-26
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Expires: 1971-01-06
Abstract
No abstract record available.
Inventors
- 👤 Gardner L Brown
- 👤 Theodore A Johnson
- 👤 Robert B Knill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:49
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10S; Y10S152/00; Y10S152/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
THE METHOD OF PREPARING A NONDISCOLORING RECLAIMED RUBBER COMPOSITION WHICH COMPRISES THE SUCCESSIVE STEPS OF DEVULCANIZING SCRAP RUBBER WITH A NONDISCOLORING RECLAIMING OIL, BLENDING SAID SCRAP RUBBER WITH A NONDISCOLORING RECLAIMING OIL, AND COMPOUNDING SAID SCRAP RUBBER WITH FINELY DIVIDED ACTIVATED CHARCOAL AND UNVULCANIZED RUBBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |