Patent US2835613A successfully refreshed from Google Patents.
US2835613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of surface-treating semi-conductors
Assignee: US Philips Corp
•
Filing: 1955-09-13
•
Granted: 1958-05-20
•
Expires: 1975-09-13
Abstract
No abstract record available.
Inventors
- 👤 Haayman Pieter Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
C; C30; C30B; C30B31/00; C30B31/04; H; H10; H10P; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/041; Y10S438/00; Y10S438/931
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF TREATING A SURFACE PORTION OF THE SURFACE OF A SEMI-CONDUCTIVE BODY, COMPRISING BRINGING THE SEMICONDUCTIVE BODY INTO CONTACT WITH A QUANTITY OF A MOLTEN MATERIAL CONTAINING A CONDUCTIVITY DETERMINING IMPURITY AND IN WHICH THE MATERIAL OF THE SEMI-CONDUCTIVE BODY IS NOT SOLUBLE TO ANY APPRECIABLE EXTENT AND FOR A TIME INTERVAL AT WHICH THE CONDUCTIVITY OF THE CONTACTED SURFACE PORTION IS ALTERED DUE TO DIFFUSION OF THE IMPURITY THEREIN, AND THEREAFTER REMOVING THE MOLTEN MATERIAL WHILE IN THE MOLTEN STATE AND BEFORE FREEZING THEREOF FROM THE SEMI-CONDUCTIVE BODY.
Claim 2
Independent Claim
91 words
A METHOD OF TREATING A SURFACE PORTION OF THE SURFACE OF A SEMI-CONDUCTIVE BODY, COMPRISING BRINGING THE SEMICONDUCTIVE BODY INTO CONTACT WITH A QUANTITY OF A MOLTEN MATERIAL CONTAINING A CONDUCTIVITY DETERMINING IMPURITY AND IN WHICH THE MATERIAL OF THE SEMI-CONDUCTIVE BODY IS NOT SOLUBLE TO ANY APPRECIABLE EXTENT AND FOR A TIME INTERVAL AT WHICH THE CONDUCTIVITY OF THE CONTACTED SURFACE PORTION IS ALTERED DUE TO DIFFUSION OF THE IMPURITY THEREIN, AND THEREAFTER REMOVING THE MOLTEN MATERIAL WHILE IN THE MOLTEN STATE AND BEFORE FREEZING THEREOF FROM THE SEMI-CONDUCTIVE BODY.
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) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |