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Patent US3028771A successfully refreshed from Google Patents.
US3028771A
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Revolving deep driller
Assignee: BOYAR SCHULTZ CORP
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Filing: 1958-06-23
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Granted: 1962-04-10
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Expires: 1978-06-23
Abstract
No abstract record available.
Inventors
- 👤 Bunnell William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:20
CPC Classifications
B; B23; B23Q; B23Q1/00; B23Q1/0009; B23Q1/0018; B23Q1/0027; B23Q1/0036; B23B; B23B43/00; B23B47/00; B23B47/34; Y; Y10; Y10S; Y10S408/00; Y10S408/705; Y10T; Y10T408/00; Y10T408/23
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |