US2647676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder
Assignee: Individual
•
Filing: 1947-02-15
•
Granted: 1953-08-04
•
Expires: 1967-02-15
Abstract
No abstract record available.
Inventors
- 👤 Peter A Napiecinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:44
CPC Classifications
E; E06; E06C; E06C1/00; E06C1/02; E06C1/32; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32008; Y10T403/32081; Y10T403/32254; Y10T403/32262; Y10T403/32418; Y10T403/32532; Y10T403/32549; Y10T403/32557; Y10T403/32581; Y10T403/32591; Y10T403/32606; Y10T403/32819; Y10T403/32852
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL19205C
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US197146A
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US1685632A
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US1374548A
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AT148345B
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US2127035A
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AT151402B
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DE682607C
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US2178856A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-03 | 1957-02-02 | 1957-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-03 | 1961-02-02 | 1961-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-03 | 1965-02-02 | 1965-08-04 | $7700.00 | Window Closed / Lapsed |