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Patent US3297469A successfully refreshed from Google Patents.
US3297469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing sheet metal surfaces with dry lubricant coatings
Assignee: Old Carco LLC
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Filing: 1963-08-02
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Granted: 1967-01-10
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Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Charles L Otis
- 👤 Bruno J Osak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:58
CPC Classifications
B; B21; B21D; B21D37/00; B21D37/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132138A
Cited
US2076793A
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US2394620A
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US2728686A
Cited
US2846342A
Cited
US2966425A
Cited
US3014811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |