US2662571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety means for leaving doors ajar
Assignee: Individual
•
Filing: 1950-05-25
•
Granted: 1953-12-15
•
Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Charles P Kessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/971; Y10S411/974; Y10S411/984; Y10T; Y10T292/00; Y10T292/28; Y10T292/283
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US464079A
Cited
US1311011A
Cited
GB189709223A
Cited
US718744A
Cited
US1066315A
Cited
US2264669A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |