US2451654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window structure
Assignee: Curtis Companies Inc
•
Filing: 1944-03-22
•
Granted: 1948-10-19
•
Expires: 1964-03-22
Abstract
No abstract record available.
Inventors
- 👤 Forrest F Beil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:53
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B2003/4438; E06B2003/4446
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US608084A
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US976297A
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US1587633A
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US1976767A
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US2203427A
Cited
US2308896A
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US2303418A
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US2275955A
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US2307647A
Cited
US2343446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-19 | 1952-04-19 | 1952-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-19 | 1956-04-19 | 1956-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-19 | 1960-04-19 | 1960-10-19 | $7700.00 | Window Closed / Lapsed |