Patent US3474882A successfully refreshed from Google Patents.
US3474882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prefabricated structural elements,especially for constructing a staircase,scaffold,or the like
Assignee: Individual
•
Filing: 1967-02-02
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Granted: 1969-10-28
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Expires: 1987-02-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:19
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/02; E04F11/022; E04F11/035; E04F11/104; E04F11/112
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1046165A
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US1419019A
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US2216250A
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US2190446A
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US2593683A
Cited
US3114941A
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US3099336A
Cited
US3245188A
Cited
US3307653A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |