US1871877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for correlating spaced points of observation
Assignee: ROLAND LORD O BRIAN
•
Filing: 1929-06-25
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Granted: 1932-08-16
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Expires: 1949-06-25
Abstract
No abstract record available.
Inventors
- 👤 Henry H Buckman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:56
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0149; G02B27/0101; B; B60; B60K; B60K2360/00; B60K2360/20; B60K2360/33; B60K2360/334; G02B2027/0118; G02B2027/0123; G02B2027/0154; G02B2027/0169; G02B27/0179; G02B2027/0187; G02B5/00; G02B5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1935-08-16 | 1936-02-15 | 1936-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-08-16 | 1940-02-15 | 1940-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-08-16 | 1944-02-15 | 1944-08-16 | $7700.00 | Window Closed / Lapsed |