Patent US2218372A successfully refreshed from Google Patents.
US2218372A
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Combined hinge and door check
Assignee: ALOIS J ZWIERZINA
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Filing: 1937-12-23
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Granted: 1940-10-15
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Expires: 1957-12-23
Abstract
No abstract record available.
Inventors
- 👤 Edward L Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:56
CPC Classifications
E; E05; E05F; E05F5/00; E05F5/06; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/12; E05C17/20; E05C17/203; E05D; E05D5/00; E05D5/02; E05D5/06; E05D5/062; E05D11/00; E05D11/06; E05Y; 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) | 1943-10-15 | 1944-04-15 | 1944-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-15 | 1948-04-15 | 1948-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-15 | 1952-04-15 | 1952-10-15 | $7700.00 | Window Closed / Lapsed |