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US3535167A
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Chromic acid-dimer acid coating composition for metals
Assignee: Diamond Shamrock Corp
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Filing: 1968-04-16
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Granted: 1970-10-20
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Expires: 1988-04-16
Abstract
No abstract record available.
Inventors
- 👤 Jon A De Ridder
- 👤 John J Freer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:11
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/02; C23C22/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2393663A
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US2480448A
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US2559812A
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US2793932A
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US2887418A
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US2927046A
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US3382081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-19 | 1974-04-20 | 1974-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-19 | 1978-04-20 | 1978-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-19 | 1982-04-20 | 1982-10-20 | $7700.00 | Window Closed / Lapsed |