US3754882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a light conductive perforated plate
Assignee: US Philips Corp
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Filing: 1972-12-01
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Granted: 1973-08-28
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Expires: 1992-12-01
Abstract
Abstract A method of manufacturing a perforated plate comprising placing a plurality of tubes in the holes of at least one perforated base plate, and filling the space between the tubes with a material having a lower softening temperature than that of the tubes. This formed block is then cut in a direction transverse to the tubes to form thinner perforated plates.
Inventors
- 👤 Esdonk J Van
- 👤 J Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:38
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B19/00; C03B19/02; H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A method of manufacturing perforated plates as claimed in claim 1, wherein placing a plurality of tubes in the holes of at least one perforated base plate comprises positioning said plurality of tubes so that their longitudinal axes are parallel to each other.
Claim 2
Dependent Claim
51 words
A method of manufacturing perforated plates as claimed in claim 1, wherein the step of filling the space between said tubes comprises, heating said material and tubes to temperatures below the melting temperature of the tubes, and cooling said material and tubes to form a block having said tubes embedded therein.
Claim 3
Dependent Claim
35 words
A method of manufacturing perforated plates as claimed in claim 1, further comprising heating the plate to the softening temperature of its material, and bending said plate over a mandrel to form a cylindrical plate.
Claim 4
Dependent Claim
25 words
A method of manufacturing perforated plates as claimed in claim 1, wherein the material of said block and tubes comprises glass and ceramic material, respectively.
Claim 5
Dependent Claim
27 words
A method of manufacturing perforated plates as claimed in claim 1, wherein the material of said tubes comprises a harder material than the material of said block.
Claim 6
Dependent Claim
36 words
A method of manufacturing perforated plates as claimed in claim 1, wherein the material of said tubes comprises a metallic material having a coefficient of thermal expansion compatible to that of the material of the block.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |