Patent US2899861A successfully refreshed from Google Patents.
US2899861A
Expired / Lapsed
US
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Follower magnifier for planimeters or similar instruments
Assignee: —
•
Filing: —
•
Granted: 1959-08-18
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Expires: 1976-08-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:13
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/002; B; B43; B43L; B43L7/00; B43L7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US586248A
Cited
US2736097A
Cited
US1900332A
Cited
US1908157A
Cited
US2026176A
Cited
US2086286A
Cited
US2510479A
Cited
US2535628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |