Patent US118736A successfully refreshed from Google Patents.
Patent US2400280A successfully refreshed from Google Patents.
US2400280A
Expired / Lapsed
US
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Window guard locking device
Assignee: AMTHOR TESTING INSTR CO Inc
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Filing: 1945-02-28
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Granted: 1946-05-14
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Expires: 1965-02-28
Abstract
No abstract record available.
Inventors
- 👤 Frederick E Amthor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:40
CPC Classifications
E; E05; E05D; E05D13/00; E05D13/04; E05D13/06; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/148; Y; Y10; Y10T; Y10T292/00; Y10T292/03; Y10T292/42; Y10T292/432
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1949-05-13 | 1949-11-12 | 1950-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-05-13 | 1953-11-12 | 1954-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-05-13 | 1957-11-12 | 1958-05-14 | $7700.00 | Window Closed / Lapsed |