US2645904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing compressed air for obtaining vibratory air movements therefrom
Assignee: Individual
•
Filing: 1948-02-21
•
Granted: 1953-07-21
•
Expires: 1968-02-21
Abstract
No abstract record available.
Inventors
- 👤 Bernardoni Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:30
CPC Classifications
D; D04; D04B; D04B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US671505A
Cited
US1397914A
Cited
US1698419A
Cited
US1789618A
Cited
US2079952A
Cited
US2292527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |