Patent US1371684A successfully refreshed from Google Patents.
US1371684A
Expired / Lapsed
US
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Process of making safety-treads
Assignee: Saint Gobain Abrasives Inc
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Filing: 1919-02-14
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Granted: 1921-03-15
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Expires: 1939-02-14
Abstract
No abstract record available.
Inventors
- 👤 George N Jeppson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:47
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/35
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-03-14 | 1924-09-13 | 1925-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-03-14 | 1928-09-13 | 1929-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-03-14 | 1932-09-13 | 1933-03-15 | $7700.00 | Window Closed / Lapsed |