US3101556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alphabet set for the practical teaching of reading and writing
Assignee: Individual
•
Filing: 1960-03-25
•
Granted: 1963-08-27
•
Expires: 1980-03-25
Abstract
No abstract record available.
Inventors
- 👤 Ponte Sabato Antonio Di
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:17
CPC Classifications
G; G09; G09B; G09B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2722061A
Cited
GB190716518A
Cited
US1354910A
Cited
US1479423A
Cited
US2581595A
Cited
US2635360A
Cited
AT185581B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |