US3473157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic drafting-digitizing apparatus
Assignee: UNIVERSAL DRAFTING MACHINE CORP
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Filing: 1965-12-23
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Granted: 1969-10-14
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Expires: 1985-12-23
Abstract
No abstract record available.
Inventors
- 👤 Charles H Little
- 👤 Waldo H Kliever
- 👤 Eugene L Wiemels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:43
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/022; G; G06; G06K; G06K15/00; G06K15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2532421A
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US2678496A
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US3004166A
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US3050669A
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US3167656A
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US3217220A
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US3217219A
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US3369163A
Cited
US3188541A
Cited
US3215914A
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US3366934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |