US3499210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mounting a protector on a drill pipe
Assignee: Sparta Industries Inc
•
Filing: 1967-06-13
•
Granted: 1970-03-10
•
Expires: 1987-06-13
Abstract
No abstract record available.
Inventors
- 👤 Herman J Schellstede
- 👤 Thomas M Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:03
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/12; B; B23; B23K; B23K5/00; B23K5/006; B23K9/00; B23K9/02; B23K9/035; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49865; Y10T29/4987; Y10T29/49876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1363160A
Cited
US1794278A
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US1947462A
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US2259023A
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US2281632A
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US2877062A
Cited
US3047073A
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US3193918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |