US3299273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical gauging system with interchangeable masks
Assignee: Individual
•
Filing: 1964-08-17
•
Granted: 1967-01-17
•
Expires: 1984-08-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph T Sturdevant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:28
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/28; G01B11/08; G01B11/26; G01B11/27
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
AN OPTICAL GAUGE FOR MEASURING THE AREA OF A LIGHT TRANSMITTING SECTION IN AN OPAQUE WORKPIECE COMPRISING, A SOURCE OF COLLIMATED LIGHT, A PHOTOCELL, A MASK FORMED WITH AN OPAQUE AREA OF SUBSTANTIALLY THE SAME SHAPE AND OF SMALLER SIZE THAN THE LIGHT TRANSMITTING SECTION IN SAID WORKPIECE, SAID MASK AND SAID WORKPIECE BEING DISPOSED IN THE PATH OF COLLIMATED LIGHT AND TOGETHER BLOCKING OUT MOST OF THE LIGHT FROM THE SOURCE TO THE PHOTOCELL, THE CROSS SECTION OF THE LIGHT BEAM AFTER PASSING SAID WORKPIECE AND MASK COMPRISING A THIN CLOSED LINE, THE AMOUNT OF LIGHT STRIKING SAID PHOTOCELL PROVIDING A MEASURE OF THE AREA OF THE LIGHT TRANSMITTING SECTION IN THE WORKPIECE.
References Cited (Backward Citations)
US2433558A
Cited
US2765704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |