Patent US3021538A successfully refreshed from Google Patents.
US3021538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread cutting tool with dulled edges on the guide teeth portion
Assignee: UNIVERSAL THREAD GRINDING Co
•
Filing: 1956-04-16
•
Granted: 1962-02-20
•
Expires: 1976-04-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Francis M Linley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:09
CPC Classifications
B; B23; B23B; B23B27/00; B23B27/06; B23B27/065; B23G; B23G5/00; B23G5/02; B23G5/06; B23B2270/00; B23B2270/16; Y; Y10; Y10T; Y10T408/00; Y10T408/89; Y10T408/904; Y10T408/9044; Y10T408/9045; Y10T408/9046; Y10T408/90467
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR415691A
Cited
US1252525A
Cited
US1365338A
Cited
DE449415C
Cited
US1748962A
Cited
US1845063A
Cited
US1874378A
Cited
US1912517A
Cited
US1953528A
Cited
US1881281A
Cited
US1936696A
Cited
US2556174A
Cited
US2744269A
Cited
US2816302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |