Patent US3249535A successfully refreshed from Google Patents.
US3249535A
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Method of retarding paraffin clogging in petroleum containers
Assignee: Dow Silicones Corp
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Filing: 1963-07-08
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Granted: 1966-05-03
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Expires: 1983-07-08
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:08
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/28; C10L1/285; E; E21; E21B; E21B37/00; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A METHOD COMPRISING RETARDING THE DEPOSITION OF PARAFFIN IN PETROLEUM CONTAINERS BY CONTACTING THE INSIDE OF THE CONTAINER WITH A SILOXANE COPOLYMER CONSISTING ESSENTIALLY OF 0.25 TO 10 MOLE PERCENT SILOZANE UNITS OF THE FORMULA
Claim 2
Independent Claim
35 words
A METHOD COMPRISING RETARDING THE DEPOSITION OF PARAFFIN IN PETROLEUM CONTAINERS BY CONTACTING THE INSIDE OF THE CONTAINER WITH A SILOXANE COPOLYMER CONSISTING ESSENTIALLY OF 0.25 TO 10 MOLE PERCENT SILOZANE UNITS OF THE FORMULA
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |