US2881569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding machine
Assignee: LEMPCO PRODUCTS Inc
•
Filing: 1955-10-24
•
Granted: 1959-04-14
•
Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 James J Strnad
- 👤 Harry B Van Auken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:37
CPC Classifications
B; B24; B24B; B24B7/00; B24B7/20; B24B7/22; B24B7/224
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US946635A
Cited
FR435400A
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US1233120A
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US1698970A
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US1854493A
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US1706402A
Cited
US1827688A
Cited
US2023347A
Cited
US2075369A
Cited
US2128023A
Cited
US2197729A
Cited
US2418738A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |