US3207421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reminder device
Assignee: Individual
•
Filing: 1962-12-14
•
Granted: 1965-09-21
•
Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 Helen R Hunger
- 👤 Kolts Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:26
CPC Classifications
B; B42; B42D; B42D5/00; B42D5/04; B42D5/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US384526A
Cited
US811846A
Cited
GB190916618A
Cited
US1281809A
Cited
US2532517A
Cited
US2754867A
Cited
US2832389A
Cited
US3057473A
Cited
US3099352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |