US2795992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring apparatus using a light beam
Assignee: Portage Machine Co
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Filing: 1954-08-23
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Granted: 1957-06-18
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Expires: 1974-08-23
Abstract
No abstract record available.
Inventors
- 👤 Tao Deh Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:30
CPC Classifications
G; G01; G01B; G01B11/00; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21
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) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |