US3499353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for cutting obround holes
Assignee: HARVEY A EWELL
•
Filing: 1968-02-14
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Granted: 1970-03-10
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Expires: 1988-02-14
Abstract
No abstract record available.
Inventors
- 👤 Harvey A Ewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B25; B25H; B25H1/00; B25H1/0021; B25H1/0057; B25H1/0064; Y; Y10; Y10T; Y10T408/00; Y10T408/34; Y10T408/36; Y10T408/38; Y10T408/3822; Y10T408/385
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1137459A
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 |