US3520506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work stool
Assignee: Crawford Fitting Co
•
Filing: 1968-03-13
•
Granted: 1970-07-14
•
Expires: 1988-03-13
Abstract
No abstract record available.
Inventors
- 👤 Zoltan Szohatzky
- 👤 Emery J Zahuranec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:10
CPC Classifications
A; A47; A47C; A47C9/00; A47C9/02; A47C9/025; A47C7/00; A47C7/02; A47C7/029; A47C9/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE204125C
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US1322256A
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CH81749A
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US1639318A
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US1832486A
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US2040126A
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US2312893A
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FR1293283A
Cited
US3367614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-13 | 1974-01-12 | 1974-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-13 | 1978-01-12 | 1978-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-13 | 1982-01-12 | 1982-07-14 | $7700.00 | Window Closed / Lapsed |