Patent US3510081A successfully refreshed from Google Patents.
US3510081A
Expired / Lapsed
US
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Drafting board with sheet feed control
Assignee: ROY J ANDERSON
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Filing: 1968-01-18
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Granted: 1970-05-05
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Expires: 1988-01-18
Abstract
No abstract record available.
Inventors
- 👤 Roy J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:26
CPC Classifications
B; B43; B43L; B43L13/00; B43L13/02; B43L13/04; B43L13/046; B43L5/00; B43L5/02; B43L5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US590696A
Cited
US1050605A
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US1208024A
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US1934952A
Cited
US1942727A
Cited
US2089757A
Cited
US2219766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-04 | 1973-11-03 | 1974-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-04 | 1977-11-03 | 1978-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-04 | 1981-11-03 | 1982-05-05 | $7700.00 | Window Closed / Lapsed |