US3006434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder construction
Assignee: Howard B Rich Inc
•
Filing: 1960-03-09
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Granted: 1961-10-31
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Howard B Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:32
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34; E06C1/36; B; B63; B63B; B63B27/00; B63B27/14
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |