US2575575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window with sash locking spring
Assignee: Individual
•
Filing: 1950-03-31
•
Granted: 1951-11-20
•
Expires: 1970-03-31
Abstract
No abstract record available.
Inventors
- 👤 Benjamin M Altwies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:03
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/34; E06B3/42; E06B3/44; E06B2003/4438; E06B2003/4453; E06B2003/4492; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/082; Y10T292/0876; Y10T292/088; Y10T292/0886; Y10T292/0887; Y10T292/0891; Y10T292/0894; Y10T292/0895; Y10T292/0898; Y10T292/0907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US542726A
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US607926A
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US817461A
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US1434038A
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US1506960A
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US1481775A
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GB228350A
Cited
US1730757A
Cited
US1670087A
Cited
US2291726A
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US2433835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |