Patent US2104011A successfully refreshed from Google Patents.
Patent US3205772A successfully refreshed from Google Patents.
US3205772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Keystone eliminator for portable projection screens
Assignee: Radiant Manufacturing Corp
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Filing: 1961-11-16
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Granted: 1965-09-14
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Expires: 1981-11-16
Abstract
No abstract record available.
Inventors
- 👤 James A Guske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A KEYSTONE ELIMINATOR FOR A PORTABLE PROJECTION SCREEN HAVING A TUBULAR SUPPORTING MEMBER, A SCREEN CASE CARRIED BY THE TUBULAR SUPPORTING MEMBER, A ROLLER MOUNTED FLEXIBLE SCREEN CARRIED BY THE SCREEN CASE AND PROVIDED WITH A BAIR FOR WITHDRAWING THE SCREEN FROMTHE SCREEN CASE, AND AN EXTENSION ROD TELESCOPICALLY CARRIED BY THE TUBULAR SUPPORTING MEMBER AND ADJUSTABLY PROJECTING THEREABOVE, COMPRISING IN COMBINATION, AN ELONGATED BRACKET HAVING A PLURALITY OF SPACED APART NOTCHES ALONG ONE OF THE LONGITUDINAL EDGES THEREOF FOR SELECTIVELY RECEIVING THE BAIL OF THE SCREEN, AND A PAIR OF SPACED APART EARS EXTENDING FROM ONE END OF THE ELONGATED BRACKET AND PROVIDED WITH OPPOSITELY DIRECTED ALIGNED FLANGES FOR ENCOMPASSING THE EXTENSION ROD AT SPACED APART POINTS THEREALONG TO REMOVABLY MOUNT THE ELONGATED BRACKET AT
Claim 2
Dependent Claim
126 words
A KEYSTONE ELIMINATOR FOR A PORTABLE PROJECTION SCREEN HAVING A TUBULAR SUPPORTING MEMBER, A SCREEN CASE CARRIED BY THE TUBULAR SUPPORTING MEMBER, A ROLLER MOUNTED FLEXIBLE SCREEN CARRIED BY THE SCREEN CASE AND PROVIDED WITH A BAIR FOR WITHDRAWING THE SCREEN FROMTHE SCREEN CASE, AND AN EXTENSION ROD TELESCOPICALLY CARRIED BY THE TUBULAR SUPPORTING MEMBER AND ADJUSTABLY PROJECTING THEREABOVE, COMPRISING IN COMBINATION, AN ELONGATED BRACKET HAVING A PLURALITY OF SPACED APART NOTCHES ALONG ONE OF THE LONGITUDINAL EDGES THEREOF FOR SELECTIVELY RECEIVING THE BAIL OF THE SCREEN, AND A PAIR OF SPACED APART EARS EXTENDING FROM ONE END OF THE ELONGATED BRACKET AND PROVIDED WITH OPPOSITELY DIRECTED ALIGNED FLANGES FOR ENCOMPASSING THE EXTENSION ROD AT SPACED APART POINTS THEREALONG TO REMOVABLY MOUNT THE ELONGATED BRACKET AT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |