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US2937815A
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US
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Assignee: Individual
•
Filing: 1957-07-10
•
Granted: 1960-05-24
•
Expires: 1977-07-10
Abstract
No abstract record available.
Inventors
- 👤 Eirich Wilhelm
- 👤 Eirich Gustav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:34
CPC Classifications
B; B02; B02C; B02C7/00; B02C7/02; B02C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US617523A
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DE322874C
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US2022135A
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US2243476A
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FR880818A
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US2478937A
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US2718178A
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US2729146A
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US2703750A
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US2678170A
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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) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |