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US2433240A
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US
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Doorknob
Assignee: Schlage Lock Co LLC
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Filing: 1945-03-19
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Granted: 1947-12-23
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Expires: 1965-03-19
Abstract
No abstract record available.
Inventors
- 👤 Schlage Anna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:59
CPC Classifications
E; E05; E05B; E05B1/00; F; F16; F16B; F16B2200/00; F16B2200/10; Y; Y10; Y10T; Y10T292/00; Y10T292/82; Y10T403/00; Y10T403/70; Y10T403/7026; Y10T403/7028; Y10T403/7075; Y10T403/7077
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-22 | 1951-06-23 | 1951-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-22 | 1955-06-23 | 1955-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-22 | 1959-06-23 | 1959-12-23 | $7700.00 | Window Closed / Lapsed |