US3795537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hard diffusion formed reaction coatings
Assignee: Individual
•
Filing: 1971-11-12
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Granted: 1974-03-05
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Expires: 1991-11-12
Abstract
Abstract A NOVEL PROCESS FOR PRODUCING HARD COATINGS BY DIFFUSING ONE OR MORE REACTIVE ELEMENTS IN MOLTEN LEAD AND REACTING WITH ONE OR MORE HARDENING ELEMENTS OF THE GROUP CARBON, NITROGEN, BORON, AND SILICON PRESENT IN FERROUS PRODUCTS. THE PROCESS OFFERS FLEXIBLITY IN COMPOSITIONAL CONTROL AND COATING PARAMETERS.
Inventors
- 👤 Thyne R Van
- 👤 J Rausch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:01
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; C23C12/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |