US3490962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion process
Assignee: International Business Machines Corp
•
Filing: 1966-04-25
•
Granted: 1970-01-20
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Michael C Duffy
- 👤 David P Kennedy
- 👤 Philip C Murley
- 👤 William J Armstrong
- 👤 Jack Jay Seaboldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:56
CPC Classifications
H; H10; H10P; H10P32/00; H10D; H10D99/00; H10P95/00; Y; Y10; Y10S; Y10S148/00; Y10S148/043; Y10S148/106; Y10S148/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2981645A
Cited
US3025589A
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US2802760A
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US2873222A
Cited
US3006789A
Cited
US2981877A
Cited
US3165430A
Cited
US3246214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |