US3543374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and bolting of structural members
Assignee: Individual
•
Filing: 1968-06-17
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Granted: 1970-12-01
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Expires: 1988-06-17
Abstract
No abstract record available.
Inventors
- 👤 John R Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:38
CPC Classifications
B; B23; B23B; B23B41/00; B23B41/003; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49623; Y10T29/49826; Y10T29/49828; Y10T29/49829; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/5138; Y10T29/53; Y10T29/53004; Y10T29/53009; Y10T29/53539
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) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |