Patent US1898609A successfully refreshed from Google Patents.
US1898609A
Expired / Lapsed
US
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Concealed door closer and check
Assignee: Hart & Hutchinson Co
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Filing: 1931-02-18
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Granted: 1933-02-21
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Expires: 1951-02-18
Abstract
No abstract record available.
Inventors
- 👤 Gustav H Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:39
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/04; E05F3/10; E05F3/108; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/644; E05Y2201/656; E05Y2600/00; E05Y2600/40; E05Y2600/41; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
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) | 1936-02-21 | 1936-08-22 | 1937-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-02-21 | 1940-08-22 | 1941-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-02-21 | 1944-08-22 | 1945-02-21 | $7700.00 | Window Closed / Lapsed |