US2818686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating ultrasonic drill
Assignee: Gulton Industries Inc
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Filing: 1956-02-28
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Granted: 1958-01-07
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Expires: 1976-02-28
Abstract
No abstract record available.
Inventors
- 👤 Mortimer E Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:04
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/44; B23Q1/48; B23Q1/4828; B23Q1/26; B23Q1/34; B24; B24B; B24B1/00; B24B1/04; B28; B28D; B28D5/00; B28D5/02; B28D5/021; B28D5/04; B28D5/047
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) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |