Patent US2904823A successfully refreshed from Google Patents.
US2904823A
Expired / Lapsed
US
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Double hung door mounting, latching and opening means
Assignee: Individual
•
Filing: 1955-09-21
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Granted: 1959-09-22
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Expires: 1975-09-21
Abstract
No abstract record available.
Inventors
- 👤 Perrill Harlan Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:29
CPC Classifications
E; E05; E05B; E05B53/00; E05B53/001; E05D; E05D15/00; E05D15/48; E05D15/50; E05D15/507; E05Y; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/175; Y10T292/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US370331A
Cited
FR806979A
Cited
US2166534A
Cited
US2261147A
Cited
US2284921A
Cited
US2577456A
Cited
US2660752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |