US2872578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-mechanical resonant system
Assignee: Individual
•
Filing: 1954-10-25
•
Granted: 1959-02-03
•
Expires: 1974-10-25
Abstract
No abstract record available.
Inventors
- 👤 Kaplan Jack
- 👤 Frank T Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0253; B06B2201/00; B06B2201/50; B06B2201/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1811128A
Cited
US1937333A
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US1982341A
Cited
US1992938A
Cited
US2396224A
Cited
US2676236A
Cited
US2683856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |