US3435912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder safety support
Assignee: RICHARD R SCHERER
•
Filing: 1967-10-16
•
Granted: 1969-04-01
•
Expires: 1987-10-16
Abstract
No abstract record available.
Inventors
- 👤 Richard R Scherer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:29
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US530374A
Cited
US1710026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |