US3786110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asphaltenes for inhibiting polymerization of pyrolysis products
Assignee: Marathon Oil Co
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Filing: 1972-05-19
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Granted: 1974-01-15
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Expires: 1992-05-19
Abstract
Abstract UNDESIRED RESIDUES FROM POLYMERS OBTAINED DURING PYROLYSIS OF PETROLLEUM FRACTIONS ARE REDUCED BY INCORPORATING UNOXIDIZED OR PARTIALLY OXIDIZED ASPHALTENES INTO THE PYROLYSIS PRODUCT STREAMS. THE ASPHALTENES PROVIDE SITE FOR POLYMER MOLECULES TO ATTACH THEMSELVES; ALSO ASPHALTENES ARE CAPABLE OF REACTING WITH THE HIGHLY REACTIVE POLYOLEFINS TO FORM LOW MOLECULAR WEIGHT POLYMERS-SUCH PREVENT THE FORMING OF HIGH MOLECULAR WEIGHT POLYMERS.
Inventors
- 👤 T Oleszko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:20
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/002; B; B01; B01D; B01D51/00; B01D51/10; C07; C07C; C07C4/00; C07C4/02; C07C4/04; C07C7/00; C07C7/20; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |