Patent US2887791A successfully refreshed from Google Patents.
US2887791A
Expired / Lapsed
US
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Topographical map and method of making same
Assignee: Individual
•
Filing: 1956-02-13
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Granted: 1959-05-26
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Expires: 1976-02-13
Abstract
No abstract record available.
Inventors
- 👤 Cameron W Garbutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:55
CPC Classifications
G; G09; G09B; G09B29/00; G09B29/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US298812A
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US772343A
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GB191030018A
Cited
CH73203A
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DE332359C
Cited
US2127546A
Cited
US2242631A
Cited
GB598336A
Cited
US2743535A
Cited
US2756054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |