US3501982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple head drilling apparatus
Assignee: LERCO Corp 1040 EAST MAIN STREET PO BOX 32890 LOUISVILLE KENTUCKY 40232 A CORP OF KENTUCKY
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Filing: 1968-05-31
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Granted: 1970-03-24
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Expires: 1988-05-31
Abstract
No abstract record available.
Inventors
- 👤 Ernest K Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:06
CPC Classifications
B; B23; B23B; B23B39/00; B23B39/16; B23B39/161; B23B39/165; B23B41/00; B23B41/003; B23B41/006; Y; Y10; Y10T; Y10T408/00; Y10T408/36; Y10T408/38; Y10T408/3822
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1027347A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-23 | 1973-09-22 | 1974-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-23 | 1977-09-22 | 1978-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-23 | 1981-09-22 | 1982-03-24 | $7700.00 | Window Closed / Lapsed |