Patent US3549391A successfully refreshed from Google Patents.
US3549391A
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US
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Corrosion proofing composition and method
Assignee: Ashland LLC
•
Filing: 1967-06-30
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Granted: 1970-12-22
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Charles R Miller
- 👤 Paul J Holtzapfel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:27
CPC Classifications
C; C09; C09D; C09D195/00; C08; C08L; C08L95/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2805954A
Cited
US2932579A
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US3227651A
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US3293050A
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US3313635A
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US3434851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |