Patent US2889614A successfully refreshed from Google Patents.
US2889614A
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Method of making tubular, pronged reinforcing members for rock strata
Assignee: SUPER GRIP ANCHOR BOLT Co
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Filing: 1957-07-05
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Granted: 1959-06-09
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Expires: 1977-07-05
Abstract
No abstract record available.
Inventors
- 👤 Llewellyn M Seely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:18
CPC Classifications
B; B21; B21D; B21D53/00; E; E21; E21D; E21D21/00; E21D21/0026; E21D21/0033; F; F16; F16B; F16B13/00; F16B13/12; F16B13/122; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49616; Y10T29/49826; Y10T29/49893; Y10T29/49908; Y10T29/49915; Y10T29/49922
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304493A
Cited
US1450961A
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US1957235A
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US2055771A
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US2233719A
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US2483934A
Cited
US2702103A
Cited
US2696137A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |