Patent US1698754A successfully refreshed from Google Patents.
Patent US3445668A successfully refreshed from Google Patents.
US3445668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ultrafast optical coincidence detector which utilizes the (1,-1,0) surface or its crystallographic equivalent in crystals of the 42m or 43m class for mixing two orthogonally polarized pulses
Assignee: International Business Machines Corp
•
Filing: 1967-05-04
•
Granted: 1969-05-20
•
Expires: 1987-05-04
Abstract
No abstract record available.
Inventors
- 👤 John A Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:05
CPC Classifications
G; G04; G04F; G04F13/00; G04F13/02; G04F13/026
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) | 1972-05-19 | 1972-11-18 | 1973-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-19 | 1976-11-18 | 1977-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-19 | 1980-11-18 | 1981-05-20 | $7700.00 | Window Closed / Lapsed |