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US2487844A
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Assignee: Individual
•
Filing: 1948-01-24
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Granted: 1949-11-15
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Expires: 1968-01-24
Abstract
No abstract record available.
Inventors
- 👤 Robert H Bigham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:45
CPC Classifications
G; G01; G01B; G01B3/00; G01B3/56; G01B3/566
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1634328A
Cited
US1290434A
Cited
US1427132A
Cited
US2069043A
Cited
US2163023A
Cited
US2397280A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |