US3500043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for high contrast imaging of phase or amplitude objects in a corpuscular ray device,such as an electron microscope
Assignee: HANSSEN KARL JOSEF
•
Filing: 1967-05-10
•
Granted: 1970-03-10
•
Expires: 1987-05-10
Abstract
No abstract record available.
Inventors
- 👤 Karl-Josef Hanssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:25
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/26; H01J37/261; H01J37/263; H01J37/02; H01J37/04; H01J2237/00; H01J2237/26; H01J2237/2614
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3213277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |