US2992589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical stress meter
Assignee: CEPAC Inc
•
Filing: 1958-02-18
•
Granted: 1961-07-18
•
Expires: 1978-02-18
Abstract
No abstract record available.
Inventors
- 👤 William E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:59
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/16; G01B11/18; G01L; G01L1/00; G01L1/24; G01L1/241
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |