US3827447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for reducing the frictional drag of flowing fluids
Assignee: Shell USA Inc
•
Filing: 1973-12-12
•
Granted: 1974-08-06
•
Expires: 1993-12-12
Abstract
Abstract The flow properties of non-aqueous liquids are improved by the incorporation thereinto of hydrogenated polyisoprene.
Inventors
- 👤 D Meier
- 👤 V Kruka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1658; C09; C09K; C09K3/00; F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; C10M; C10M2205/00; C10M2205/06; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A method according to claim 1 wherein the liquid medium is a hydrocarbon.
Claim 2
Dependent Claim
28 words
A method according to claim 1 wherein the hydrogenated polyisoprene has a molecular weight within the range of from about 1 X 105 to about 2 X 107.
References Cited (Backward Citations)
US3687148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |