Patent US2507768A successfully refreshed from Google Patents.
US2507768A
Expired / Lapsed
US
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Device for posture study
Assignee: Berger Brothers Co
•
Filing: 1946-07-22
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Granted: 1950-05-16
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Expires: 1966-07-22
Abstract
No abstract record available.
Inventors
- 👤 Emory C Champagne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G09B23/30; G09B23/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1670159A
Cited
US2121212A
Cited
US2118093A
Cited
US2136207A
Cited
US2180181A
Cited
US2331967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-15 | 1953-11-14 | 1954-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-15 | 1957-11-14 | 1958-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-15 | 1961-11-14 | 1962-05-16 | $7700.00 | Window Closed / Lapsed |