Patent US2736991A successfully refreshed from Google Patents.
US2736991A
Expired / Lapsed
US
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Method of treating and marking out tracts of land from aircraft
Assignee: Individual
•
Filing: 1952-12-08
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Granted: 1956-03-06
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Expires: 1972-12-08
Abstract
No abstract record available.
Inventors
- 👤 Schumacher Gustav
- 👤 Haronska Gerd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:38
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1501427A
Cited
DE488479C
Cited
GB486113A
Cited
FR890107A
Cited
US2356119A
Cited
US2426771A
Cited
US2504580A
Cited
US2504247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |