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US2768459A
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US
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Multi-year calendars
Assignee: Individual
•
Filing: 1952-04-03
•
Granted: 1956-10-30
•
Expires: 1972-04-03
Abstract
No abstract record available.
Inventors
- 👤 Carl C Corbett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:11
CPC Classifications
G; G09; G09D; G09D3/00; G09D3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US463070A
Cited
US1949328A
Cited
US2505341A
Cited
US1286058A
Cited
US1500913A
Cited
US2506888A
Cited
US2575929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |