US3410635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specimen examination chamber
Assignee: CLARENCE JAMES LOCKWOOD
•
Filing: 1967-05-31
•
Granted: 1968-11-12
•
Expires: 1987-05-31
Abstract
No abstract record available.
Inventors
- 👤 Lockwood Clarence James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0008
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US42843A
Cited
US56178A
Cited
US271838A
Cited
US2961108A
Cited
US3029694A
Cited
US3119185A
Cited
FR1249713A
Cited
US3121961A
Cited
US3213539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |