Patent US4017840A successfully refreshed from Google Patents.
Patent US3276519A successfully refreshed from Google Patents.
US3276519A
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Paraffin control method
Assignee: Halliburton Co
•
Filing: 1963-05-29
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Granted: 1966-10-04
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Expires: 1983-05-29
Abstract
No abstract record available.
Inventors
- 👤 John A Knox
- 👤 Billy B Arnold
- 👤 Almon B Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/927; Y10S507/929; Y10S507/93; Y10S507/931
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
93 words
A METHOD OF TREATING OIL AND GAS WELLS AND THE LIKE FOR INHIBITING THE DEPOSITION OF ASPHALT ON SURFACES PAST WHICH LIQUID HYDROCARBONS ARE CONDUCTED, COMPRISING THE STEP OF INTRODUCING INTO THE WELL A TREATING COMPOSITION CONSISTING OF AT LEAST ONE POLYCYCLIC AROMATIC COMPOUND HAVING AT LEAST TWO RINGS OF CARBON ATOMS SAID POLYCYCLIC AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PYRENE, PHENANTHRENE, FLUORANTHENE, FLUORINE, CHRYSENE, ACENAPHTHENE, INDENE, NAPHTHACENE, NAPHTHANTHRACENE, THE ALKYLATED DERIVATIVES THEREOF, THE HYDROXYLATED DERIVATIVES THEREOF, THE ACID DERIVATIVES THEREOF, THE NITROGENCONTAINING COMPOUNDS DERIVED THEREFROM AND THE ARYLATED DERIVATIVES THEREOF.
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |