US3524752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Addition of nitrogen gas to atmosphere in alloy diffusion coating
Assignee: EIDP Inc
•
Filing: 1967-08-01
•
Granted: 1970-08-18
•
Expires: 1987-08-01
Abstract
No abstract record available.
Inventors
- 👤 Richard A Fleming
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:21
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3186865A
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US3184330A
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US3236684A
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US3342628A
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US3184292A
Cited
US3261712A
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US3413142A
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US3377195A
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US3377196A
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US3287159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |