US2694841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window sash
Assignee: Individual
•
Filing: 1951-02-23
•
Granted: 1954-11-23
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Expires: 1971-02-23
Abstract
No abstract record available.
Inventors
- 👤 Persson Eric Sigfrid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:13
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/04; E06B3/26; E06B3/2605; E06B3/06; E06B3/08; E06B2003/2625
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1946169A
Cited
US2046251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |