US3409370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measurement of lengths and of other physical parameters which are capable of altering an optical path length
Assignee: National Research Development Corp UK
•
Filing: 1963-11-21
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Granted: 1968-11-05
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Expires: 1983-11-21
Abstract
No abstract record available.
Inventors
- 👤 King Percy George Robert
- 👤 Steward Graham John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:24
CPC Classifications
H; H01; H01S; H01S3/00; G; G01; G01N; G01N21/00; G01N21/17; G01N21/41; G01N21/45
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3187270A
Cited
US3243722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |