Patent US2537896A successfully refreshed from Google Patents.
US2537896A
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US
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Hardware unit for ventilating doors
Assignee: Individual
•
Filing: 1946-05-29
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Granted: 1951-01-09
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Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 Ora A Hinton
- 👤 Stramp Louise De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:27
CPC Classifications
E; E05; E05C; E05C7/00; E05C7/02; Y; Y10; Y10S; Y10S292/00; Y10S292/21; Y10S70/00; Y10S70/65; Y10T; Y10T292/00; Y10T292/03; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0971; Y10T292/1014; Y10T292/1022; Y10T292/1028
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US949409A
Cited
US993876A
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US1198579A
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US1186263A
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US2239301A
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US2124897A
Cited
US2218960A
Cited
US2381666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |