Patent US1714028A successfully refreshed from Google Patents.
US1714028A
Expired / Lapsed
US
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Stepladder
Assignee: Individual
•
Filing: 1925-04-04
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Granted: 1929-05-21
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Expires: 1945-04-04
Abstract
No abstract record available.
Inventors
- 👤 Fred C Knuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:24
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/16; E06C7/165; E06C1/00; E06C1/02; E06C1/38
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) | 1932-05-20 | 1932-11-19 | 1933-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-05-20 | 1936-11-19 | 1937-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-05-20 | 1940-11-19 | 1941-05-21 | $7700.00 | Window Closed / Lapsed |