Patent US3746502A successfully refreshed from Google Patents.
US3746502A
Expired / Lapsed
US
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Evaporation crucible
Assignee: Xerox Corp
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Filing: 1971-12-20
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Granted: 1973-07-17
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Expires: 1991-12-20
Abstract
Abstract An evaporation crucible comprising an elongated tubular portion having a single slot or a series of evenly spaced elongated slots at the top surface of said tubular portion. A series of continuous compartments are located at the internal bottom surface of the tubular portion with a series of plates evenly dividing said compartments.
Inventors
- 👤 F Erhart
- 👤 C Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:49
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/243
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
An evaporation crucible comprising a central tubular portion having a series of evenly spaced elongated slots at the top surface of said tubular portion, a series of continuous compartments located at the bottom of said tubular portion, with a series of dams evenly dividing said compartments, with the height of said dams being a maximum of about one-fourth that of the radius of the tubular portion, a section at each end of said tubular portion which is not utilized for evaporation, and a plate at either end of said tubular portion of said crucible.
Claim 2
Dependent Claim
94 words
An evaporation crucible comprising a central tubular portion having a series of evenly spaced elongated slots at the top surface of said tubular portion, a series of continuous compartments located at the bottom of said tubular portion, with a series of dams evenly dividing said compartments, with the height of said dams being a maximum of about one-fourth that of the radius of the tubular portion, a section at each end of said tubular portion which is not utilized for evaporation, and a plate at either end of said tubular portion of said crucible.
Claim 3
Dependent Claim
17 words
The crucible of claim 1 in which a single slot runs the length of the top surface.
Claim 4
Dependent Claim
24 words
The crucible of claim 1 which a plurality of slots are located along at least one side of the tubular portion of the crucible.
Claim 5
Dependent Claim
24 words
The crucible of claim 1 in which at least one longitudinal slot is located along opposite sides of the tubular portion of the crucible.
Claim 6
Dependent Claim
32 words
The crucible of claim 1 in which at least one longitudinal slot is located at opposite sides of the tubular portion of the crucible at an angle approximately 90* from the vertical.
References Cited (Backward Citations)
US964871A
Cited
US3598384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |