US2623862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber reclaiming solvents
Assignee: Phillips Petroleum Co
•
Filing: 1949-03-18
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Granted: 1952-12-30
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Expires: 1969-03-18
Abstract
No abstract record available.
Inventors
- 👤 James H Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:31
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/10; C08J11/18; C08J11/20; C08J2321/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
IN A PROCESS FOR RECLAIMING RUBBER, THE STEP OF DIGESTING PREVIOUSLY VULCANIZING SCRAP RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER AND RUBBERY COPOLYMER OF BUTADIENE AND STYRENE WITH A GRAY TOWER POLYMER OBTAINED AS A RESIDUAL BY-PRODUCT IN THE REFINING OF GASOLINE AND INEFFECTIVE PER SE AS A RECLAIMANT, TO WHICH HAS BEEN ADDED FROM 5 TO 50 WEIGHT PER CENT OF DICYCLOPENTADIENE SUFFICIENT TO RAISE THE RUBBER RECLAIMING CHARACTERISTICS OF SAID POLYMER.
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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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |