Patent US4920979A successfully refreshed from Google Patents.
Patent US3550487A successfully refreshed from Google Patents.
US3550487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: Kearney and Trecker Corp
•
Filing: 1969-07-17
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Granted: 1970-12-29
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Expires: 1989-07-17
Abstract
No abstract record available.
Inventors
- 👤 John S Randall
- 👤 Morris L Hutchens
- 👤 Wallace E Brainard
- 👤 Erich F Drechsler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:20
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/64; B23Q1/66; B23Q16/00; B23Q16/02; B23Q16/08; B23Q7/00; B23Q7/04; B23Q7/048; B23Q7/14; B23Q7/1426; B23Q7/1431; Y; Y10; Y10T; Y10T483/00; Y10T483/17; Y10T483/1702; Y10T483/1705; Y10T483/1714; Y10T82/00; Y10T82/25; Y10T82/2514; Y10T82/2516
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |