Patent US1442694A successfully refreshed from Google Patents.
US1442694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sidehill ladder
Assignee: Individual
•
Filing: 1920-01-19
•
Granted: 1923-01-16
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Expires: 1940-01-19
Abstract
No abstract record available.
Inventors
- 👤 Martin Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/14; E06C1/16; E06C1/20; E06C7/00; E06C7/42; E06C7/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1926-01-15 | 1926-07-17 | 1927-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-01-15 | 1930-07-17 | 1931-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-01-15 | 1934-07-17 | 1935-01-16 | $7700.00 | Window Closed / Lapsed |