Patent US2815160A successfully refreshed from Google Patents.
US2815160A
Expired / Lapsed
US
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Ladder attachment
Assignee: Individual
•
Filing: 1953-07-31
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Granted: 1957-12-03
•
Expires: 1973-07-31
Abstract
No abstract record available.
Inventors
- 👤 John J Gilmour
- 👤 Guido K Bassler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/34; E06C1/345; E06C7/00; E06C7/48; E06C7/488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US799782A
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US783259A
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US1541402A
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US1684269A
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US1800792A
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US1813865A
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US1960863A
Cited
US2317444A
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US2330766A
Cited
US2638386A
Cited
US2680554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |