US3112231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective coating
Assignee: Pennwalt Corp
•
Filing: 1957-06-20
•
Granted: 1963-11-26
•
Expires: 1977-06-20
Abstract
No abstract record available.
Inventors
- 👤 Ludwig K Schuster
- 👤 Jr Alfonso L Baldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:02
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/73; C23C22/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1824082A
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US2022798A
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DE860306C
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GB558792A
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US2393663A
Cited
US2762732A
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US2777785A
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US2757977A
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US2858244A
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US2773623A
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US2846342A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |