Patent US2581008A successfully refreshed from Google Patents.
Patent US3785879A successfully refreshed from Google Patents.
US3785879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnesium oxide coatings
Assignee: MARINE MAGNESIUM COMPANY A PARTNERSHIP OF PA
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Filing: 1972-03-20
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Granted: 1974-01-15
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Expires: 1992-03-20
Abstract
Abstract Lithium additives in magnesium oxide/magnesium hydroxide coatings for silicon steel and the material coated by such process.
Inventors
- 👤 L Lee
- 👤 Y Uyeda
- 👤 L Heneghan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:07
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/68; C21D1/70; C23; C23C; C23C24/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
The composition of claim 1 wherein the lithium compound is lithium borate.
Claim 2
Dependent Claim
12 words
The composition of claim 2 wherein the lithium borate is lithium metaborate.
Claim 3
Dependent Claim
9 words
The composition of claim 1 which contains lithium chromate.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |