Patent US2961922A successfully refreshed from Google Patents.
US2961922A
Expired / Lapsed
US
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Combined photographic transparency and sound track carrier support frame
Assignee: Kalart Co Inc
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Filing: 1954-07-09
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Granted: 1960-11-29
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Expires: 1974-07-09
Abstract
No abstract record available.
Inventors
- 👤 Schwartz Morris
- 👤 Edward K Kaprelian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:08
CPC Classifications
G; G03; G03B; G03B31/00; G03B31/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1541002A
Cited
AU1686728A
Cited
GB337554A
Cited
US1864519A
Cited
US2314417A
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US2587433A
Cited
US2647437A
Cited
US2683390A
Cited
US2913913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |