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Patent US3425309A successfully refreshed from Google Patents.
US3425309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heads of drums,banjos,tympani and the like musical instruments
Assignee: Individual
•
Filing: 1964-02-18
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Granted: 1969-02-04
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Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
- 👤 Abraham Isidore Elzas
- 👤 Abraham Samuel Elzas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:44
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/10; G10D13/20; G10D13/01; G10D13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |