US3133840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of junction devices with phosphorous tribromide
Assignee: AT&T Inc
•
Filing: 1962-03-08
•
Granted: 1964-05-19
•
Expires: 1982-03-08
Abstract
No abstract record available.
Inventors
- 👤 Walter M Gibson
- 👤 Thomas C Madden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
H; H10; H10P; H10P14/00; H10P14/60; H10P14/63; H10P14/6302; H10P14/6322; H10P14/6304; H10P14/6306; H10P14/6308; H10P14/6309; H10P95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
IN THE PROCESS FOR THE FABRICATION OF A SEMICONDUCTIVE DEVICE WHICH COMPRISES THE STEPS OF FORMING AN OXIDE COATING ON A SEMICONDUCTIVE BODY, SELECTIVELY ETCHING SAID SEMICONDUCTIVE BODY WHEREY PORTIONS OF SAID OXIDE
Claim 2
Dependent Claim
33 words
IN THE PROCESS FOR THE FABRICATION OF A SEMICONDUCTIVE DEVICE WHICH COMPRISES THE STEPS OF FORMING AN OXIDE COATING ON A SEMICONDUCTIVE BODY, SELECTIVELY ETCHING SAID SEMICONDUCTIVE BODY WHEREY PORTIONS OF SAID OXIDE
References Cited (Backward Citations)
US2802760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |