US2730008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical micrometer
Assignee: Research Corp
•
Filing: 1954-06-30
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Granted: 1956-01-10
•
Expires: 1974-06-30
Abstract
No abstract record available.
Inventors
- 👤 John H Mcginn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
G; G01; G01C; G01C1/00; G01C1/02; G01C1/06; G01B; G01B9/00; G01B9/04; G02; G02B; G02B21/00; G02B21/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2494441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |