Patent US2881028A successfully refreshed from Google Patents.
US2881028A
Expired / Lapsed
US
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Ladder platform
Assignee: Individual
•
Filing: 1957-10-11
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Granted: 1959-04-07
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Expires: 1977-10-11
Abstract
No abstract record available.
Inventors
- 👤 James D Baird
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:46
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732264A
Cited
US1386511A
Cited
US1553279A
Cited
GB268709A
Cited
US1918293A
Cited
US2599169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |