US2933387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a vacuum evaporated strain gage
Assignee: Individual
•
Filing: 1957-06-28
•
Granted: 1960-04-19
•
Expires: 1977-06-28
Abstract
No abstract record available.
Inventors
- 👤 Dudley D Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:26
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF PRODUCING A STRAIN GAGE USABLE AT A HIGH TEMPERATURE AND COMPRISING VACUUM DEPOSITING A QUARTZ COATING ON A SURFACE TO BE STRAINED, SAID COATING BEING CHARACTERIZED BY A CHEMICAL AND ELECTRICAL STABILITY OVER A WIDE TEMPERATURE RANGE ON THE OBJECT TO BE GAGED, SAID COATING CLOSELY ADHERING TO SAID OBJECT AND SUBJECT TO MINUTE CHANGES IN SIZE OR POSITION OF SAID OBJECT, VACUUM DEPOSITING AN ELECTRICAL CONDUCTIVE COATING OF UNIFORM THICKNESS ON SAID QUARTZ COATING, COATING SAID CONDUCTIVE COATING WITH A LIGHT SENSITIVE EMULSION, CONSTRUCTING A PATTERN FOR SAID GAGE, PHOTOGRAPHICALLY REPRODUCING A REDUCED IMAGE OF SAID PATTERN ON SAID LIGHT SENSITIVE EMULSION, AND REMOVING THE PORTIONS OF THE EMULSION NOT COVERED BY THE REPRODUCED IMAGE AND THAT PART OF THE CONDUCTIVE COATING NOT UNDERLYING SAID IMAGE.
Claim 2
Independent Claim
130 words
A METHOD OF PRODUCING A STRAIN GAGE USABLE AT A HIGH TEMPERATURE AND COMPRISING VACUUM DEPOSITING A QUARTZ COATING ON A SURFACE TO BE STRAINED, SAID COATING BEING CHARACTERIZED BY A CHEMICAL AND ELECTRICAL STABILITY OVER A WIDE TEMPERATURE RANGE ON THE OBJECT TO BE GAGED, SAID COATING CLOSELY ADHERING TO SAID OBJECT AND SUBJECT TO MINUTE CHANGES IN SIZE OR POSITION OF SAID OBJECT, VACUUM DEPOSITING AN ELECTRICAL CONDUCTIVE COATING OF UNIFORM THICKNESS ON SAID QUARTZ COATING, COATING SAID CONDUCTIVE COATING WITH A LIGHT SENSITIVE EMULSION, CONSTRUCTING A PATTERN FOR SAID GAGE, PHOTOGRAPHICALLY REPRODUCING A REDUCED IMAGE OF SAID PATTERN ON SAID LIGHT SENSITIVE EMULSION, AND REMOVING THE PORTIONS OF THE EMULSION NOT COVERED BY THE REPRODUCED IMAGE AND THAT PART OF THE CONDUCTIVE COATING NOT UNDERLYING SAID IMAGE.
References Cited (Backward Citations)
US2435889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |