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US2810197A
Expired / Lapsed
US
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Drafting instruments
Assignee: Individual
•
Filing: 1954-07-01
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Granted: 1957-10-22
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Expires: 1974-07-01
Abstract
No abstract record available.
Inventors
- 👤 Robert C Sherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:13
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/14; B43L13/141; B43L13/145
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |