US3354005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of applying doping compositions to base materials
Assignee: AT&T Inc
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Filing: 1965-10-23
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Granted: 1967-11-21
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Expires: 1985-10-23
Abstract
No abstract record available.
Inventors
- 👤 Donald C Lepiane
- 👤 Henry N Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:41
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/02; H; H10; H10P; H10P32/00; H10P32/10; H10P32/14; H10P32/1408; H10P32/17; H10P32/171; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/118
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
201 words
IN A PROCESS OF DIFFUSING A DOPING AGENT INTO A SURFACE OF A BODY MATERIAL, WHEREIN SOLID PARTICLES OF A DOPING COMPOSITION CONTAINING THE DOPING AGENT ARE APPLIED TO THE SURFACE OF THE BASE MATERIAL AND HEATED TO A TEMPERATURE SUFFICIENT TO CAUSE THE DOPING AGENT TO DIFFUSE INTO THE SURFACE OF THE BASE MATERIAL, AN IMPROVED METHOD OF APPLYING A PREDETERMINED AMOUNT OF THE DOPING COMPOSITION OF THE BODY OF BASE MATERIAL, WHICH COMPRISES: (A) FORMING A SUSPENSION OF PARTICLES OF THE DOPING COMPOSITION IN A LIQUID ORGANIC CARRIER OF A TYPE WHICH CAN BE SOLIDIFIED AND WHICH, IN SOLID FORM, CAN BE VAPORIZED AT A TEMPERATURE BELOW THE DIFFUSION TEMPERATURE; (B) SOLIDIFYING THE SUSPENSION TO FORM A SOLID COMPOSITE MASS OF THE PARTICLES SUSPENDED IN A MATRIX OF THE SOLID FORM OF THE CARRIER; AND (C) PLACING A PREDETERMINED PORTION OF THE SOLID MASS ON THE SURFACE OF THE BODY OF BASE MATERIAL, THE SIZE OF THE PORTION BEING SELECTED TO PROVIDE THE DESIRED AMOUNT OF SUSPENDED DOPING AGENT FOR THE DIFFUSION OPERATION, AFTER WHICH THE ASSEMBLY MAY BE HEATED TO DRIVE OF THE CARRIER AND CAUSE THE DOPING AGENT TO DIFFUSE INTO THE SURFACE OF THE BASE MATERIAL.
Claim 2
Dependent Claim
201 words
IN A PROCESS OF DIFFUSING A DOPING AGENT INTO A SURFACE OF A BODY MATERIAL, WHEREIN SOLID PARTICLES OF A DOPING COMPOSITION CONTAINING THE DOPING AGENT ARE APPLIED TO THE SURFACE OF THE BASE MATERIAL AND HEATED TO A TEMPERATURE SUFFICIENT TO CAUSE THE DOPING AGENT TO DIFFUSE INTO THE SURFACE OF THE BASE MATERIAL, AN IMPROVED METHOD OF APPLYING A PREDETERMINED AMOUNT OF THE DOPING COMPOSITION OF THE BODY OF BASE MATERIAL, WHICH COMPRISES: (A) FORMING A SUSPENSION OF PARTICLES OF THE DOPING COMPOSITION IN A LIQUID ORGANIC CARRIER OF A TYPE WHICH CAN BE SOLIDIFIED AND WHICH, IN SOLID FORM, CAN BE VAPORIZED AT A TEMPERATURE BELOW THE DIFFUSION TEMPERATURE; (B) SOLIDIFYING THE SUSPENSION TO FORM A SOLID COMPOSITE MASS OF THE PARTICLES SUSPENDED IN A MATRIX OF THE SOLID FORM OF THE CARRIER; AND (C) PLACING A PREDETERMINED PORTION OF THE SOLID MASS ON THE SURFACE OF THE BODY OF BASE MATERIAL, THE SIZE OF THE PORTION BEING SELECTED TO PROVIDE THE DESIRED AMOUNT OF SUSPENDED DOPING AGENT FOR THE DIFFUSION OPERATION, AFTER WHICH THE ASSEMBLY MAY BE HEATED TO DRIVE OF THE CARRIER AND CAUSE THE DOPING AGENT TO DIFFUSE INTO THE SURFACE OF THE BASE MATERIAL.
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) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |