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US3373669A
Expired / Lapsed
US
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Spreaders
Assignee: FRANCIS J SCHMITZ
•
Filing: 1965-09-01
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Granted: 1968-03-19
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Expires: 1985-09-01
Abstract
No abstract record available.
Inventors
- 👤 Francis J Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:36
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/15; E01C19/48; E01C19/4866; E01C19/4873
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |