Patent US2579892A successfully refreshed from Google Patents.
US2579892A
Expired / Lapsed
US
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Outdoor projection screen
Assignee: C S Wright & Co
•
Filing: 1948-11-20
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Granted: 1951-12-25
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Expires: 1968-11-20
Abstract
No abstract record available.
Inventors
- 👤 Chauncey S Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:10
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/167; Y10T428/24; Y10T428/24174
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1806864A
Cited
US1043988A
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US1129933A
Cited
US1347761A
Cited
US1487747A
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US1513570A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |