US3290883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drag reduction in hydraulic equipment
Assignee: General Electric Co
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Filing: 1965-04-29
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Granted: 1966-12-13
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Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Walter B Giles
- 👤 Stern Hansjoerg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:50
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; F03; F03B; F03B11/00; F03B11/002; F03B3/00; F03B3/12; F04; F04D; F04D29/00; F04D29/66; F04D29/68; F04D29/688; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y02T; Y02T70/00; Y02T70/10; Y10; Y10S; Y10S415/00; Y10S415/914; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF REDUCING FRICTIONAL DRAG IN HYDRAULIC SYSTEMS COMPRISING THE STEPS OF ADDING A VISCOELASTIC, WATER SOLUBLE, LINEAR, HIGH MOLECULAR WEIGHT, POLYMER TO THE FLOW BEFORE IT ENTERS THE EQUIPMENTS SO THAT IN PASSING THERETHROUGH IT WILL SUBSTANTIALLY REDUCE FRICTIONAL DRAG THEREIN, AND RECIRCULATING A PORTION OF THE POLYMETER THAT PASSES THROUGH THE SYSTEM TO MAKE MAXIMUM USE THEREOF.
Claim 2
Independent Claim
60 words
A METHOD OF REDUCING FRICTIONAL DRAG IN HYDRAULIC SYSTEMS COMPRISING THE STEPS OF ADDING A VISCOELASTIC, WATER SOLUBLE, LINEAR, HIGH MOLECULAR WEIGHT, POLYMER TO THE FLOW BEFORE IT ENTERS THE EQUIPMENTS SO THAT IN PASSING THERETHROUGH IT WILL SUBSTANTIALLY REDUCE FRICTIONAL DRAG THEREIN, AND RECIRCULATING A PORTION OF THE POLYMETER THAT PASSES THROUGH THE SYSTEM TO MAKE MAXIMUM USE THEREOF.
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |