US3028929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder attachment
Assignee: Individual
•
Filing: 1960-03-08
•
Granted: 1962-04-10
•
Expires: 1980-03-08
Abstract
No abstract record available.
Inventors
- 👤 Howard L Chubbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:25
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1195740A
Cited
US1915715A
Cited
DE848245C
Cited
US2910135A
Cited
FR1121612A
Cited
US2903086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |