US4544701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stamp molded paraffin scraper
Assignee: Phillips Petroleum Co
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Filing: 1984-03-28
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Granted: 1985-10-01
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Expires: 2004-03-28
Abstract
Abstract A pair of substantially identical half-sections adapted to be wedged around a rod in locked position with the half-sections stamp molded from a prepreg formed by surrounding at least one fiber mat of inorganic reinforcing material with a matrix of PPS to produce a prepreg containing from about 15 to about 45 weight percent of the inorganic reinforcing material.
Inventors
- 👤 John H. Walker
- 👤 Harold V. Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:08
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08J; C08J5/00; C08J5/04; C08J5/0405; C08J2381/00; C08J2381/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A rod guide, suitable for field installation, comprising a pair of substantially identical half-sections adapted to be wedged around a rod in locked position, said half-sections stamp molded from a prepreg containing from about 15 to about 45 weight percent of an inorganic reinforcing agent, formed by surrounding at least one inorganic material fiber mat with a matrix of poly(phenylene sulfide).
Claim 2
Dependent Claim
61 words
A rod guide, suitable for field installation, comprising a pair of substantially identical half-sections adapted to be wedged around a rod in locked position, said half-sections stamp molded from a prepreg containing from about 15 to about 45 weight percent of an inorganic reinforcing agent, formed by surrounding at least one inorganic material fiber mat with a matrix of poly(phenylene sulfide).
Claim 3
Dependent Claim
40 words
A rod guide of claim 1 wherein said inorganic reinforcing agents formed into a fiber mat comprise a reinforcing material chosen from among glass fiber, carbon fiber, a mixture of glass and carbon fiber, metal fiber, and fiber-forming inorganic material.
Claim 4
Dependent Claim
26 words
A rod guide of claim 2 wherein said reinforcing material is chosen from among glass fiber, carbon fiber, and a mixture of glass and carbon fiber.
Claim 5
Dependent Claim
37 words
A rod guide of claim 2 wherein said reinforcing agent is chosen from among metal fiber of the group consisting of essentially of iron, steel alloys, cobalt, nickel, chromium, tungsten, copper, brass alloys, zinc, magnesium and aluminum.
Claim 6
Dependent Claim
37 words
A rod guide of claim 2 wherein said inorganic reinforcing agent is fiber-forming inorganic material chosen from the group consisting essentially of beryllia, magnesia, alumina, silica, zirconia, thoria, boron, boron nitrate, boron carbide, silica carbide, and alumino-silicate.
Claim 7
Dependent Claim
14 words
A rod guide of claim 3 wherein the inorganic reinforcing agent is chopped glass.
Claim 8
Dependent Claim
23 words
A rod guide of claim 6 wherein said prepreg contains from about 20 to about 30 weight percent of said inorganic reinforcing agent.
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) | 1988-09-30 | 1989-04-01 | 1989-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-30 | 1993-04-01 | 1993-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-30 | 1997-04-01 | 1997-10-01 | $7700.00 | Window Closed / Lapsed |