Patent US3441817A successfully refreshed from Google Patents.
US3441817A
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US
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Machine control system for generating rectilinear and curvilinear geometrical forms
Assignee: Sfm Corp
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Filing: 1965-01-18
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Granted: 1969-04-29
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Expires: 1985-01-18
Abstract
No abstract record available.
Inventors
- 👤 Robert H Eisengrein
- 👤 Francis O Blackwell
- 👤 Forrest B Golden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:00
CPC Classifications
B; B23; B23K; B23K7/00; B23K7/10; B23K7/105; G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/37; G05B19/371; G05B2219/00; G05B2219/30; G05B2219/34; G05B2219/34122; G05B2219/34136; G05B2219/34151; G05B2219/34184; G05B2219/43; G05B2219/43006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2900586A
Cited
US2862661A
Cited
US3161110A
Cited
US3148316A
Cited
US3328655A
Cited
US3259819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |