US2434071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Picture screen supporting structure
Assignee: DA LITE SCREEN CO Inc
•
Filing: 1944-05-12
•
Granted: 1948-01-06
•
Expires: 1964-05-12
Abstract
No abstract record available.
Inventors
- 👤 John T Heck
- 👤 Mais Leo J Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:03
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US930406A
Cited
US1203853A
Cited
US1214979A
Cited
US1917369A
Cited
US2335884A
Cited
US2355799A
Cited
US2361119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |