Patent US831772A successfully refreshed from Google Patents.
US831772A
Expired / Lapsed
US
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Removable cover for tablets and books.
Assignee: Individual
•
Filing: 1905-08-05
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Granted: 1906-09-25
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Expires: 1925-08-05
Abstract
No abstract record available.
Inventors
- 👤 Samuel G Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:42
CPC Classifications
B; B42; B42D; B42D3/00; B42D3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1909-09-24 | 1910-03-26 | 1910-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1913-09-24 | 1914-03-26 | 1914-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1917-09-24 | 1918-03-26 | 1918-09-25 | $7700.00 | Window Closed / Lapsed |