US3385682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and reagent for surface polishing
Assignee: Sprague Electric Co
•
Filing: 1965-04-29
•
Granted: 1968-05-28
•
Expires: 1985-04-29
Abstract
No abstract record available.
Inventors
- 👤 Lowen Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:00
CPC Classifications
H; H10; H10P; H10P52/00; H10P52/40; H10P52/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1800881A
Cited
US2082950A
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US2294760A
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US2683343A
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US3103733A
Cited
US3158517A
Cited
US3248235A
Cited
US3228816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |