US2430727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doorknob
Assignee: Emhart Industries Inc
•
Filing: 1944-10-04
•
Granted: 1947-11-11
•
Expires: 1964-10-04
Abstract
No abstract record available.
Inventors
- 👤 Sigurd P Morgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:51
CPC Classifications
E; E05; E05B; E05B3/00; Y; Y10; Y10T; Y10T292/00; Y10T292/82
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US538952A
Cited
US1487975A
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US1753700A
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US1840706A
Cited
US2105616A
Cited
US2105617A
Cited
US2208592A
Cited
US2123539A
Cited
US2216467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |