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Patent US3506499A successfully refreshed from Google Patents.
US3506499A
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Method of surface-treating zinc,aluminum and their alloys
Assignee: Yawata Seitetsu KK
•
Filing: 1965-03-10
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Granted: 1970-04-14
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Expires: 1985-03-10
Abstract
No abstract record available.
Inventors
- 👤 Hideya Okada
- 👤 Hideo Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:15
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030601A
Cited
US2680081A
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US2850415A
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US2989418A
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US3133829A
Cited
US3013897A
Cited
US3150015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |