US2454523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door casement and method of forming the same
Assignee: Individual
•
Filing: 1945-06-11
•
Granted: 1948-11-23
•
Expires: 1965-06-11
Abstract
No abstract record available.
Inventors
- 👤 Philip George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:53
CPC Classifications
E; E06; E06B; E06B1/00; E06B1/04; E06B1/52; E06B1/12; E06B1/18; E06B1/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US593435A
Cited
US899259A
Cited
US958795A
Cited
US1048988A
Cited
US1085605A
Cited
CH214565A
Cited
US2234043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-23 | 1952-05-24 | 1952-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-23 | 1956-05-24 | 1956-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-23 | 1960-05-24 | 1960-11-23 | $7700.00 | Window Closed / Lapsed |