US3037579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder attachment
Assignee: Individual
•
Filing: 1960-12-30
•
Granted: 1962-06-05
•
Expires: 1980-12-30
Abstract
No abstract record available.
Inventors
- 👤 William H Barrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:27
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US363483A
Cited
US683527A
Cited
US1206574A
Cited
US1593366A
Cited
US1920552A
Cited
US2237596A
Cited
US2710129A
Cited
DE848245C
Cited
DE926633C
Cited
US2808975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |