Patent US6181271B1 successfully refreshed from Google Patents.
US3548431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Book repair device and method
Assignee: Maple Press Co
•
Filing: 1969-05-14
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Granted: 1970-12-22
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Expires: 1989-05-14
Abstract
No abstract record available.
Inventors
- 👤 Lewis William Hall
- 👤 Stanley E Spangler
- 👤 Samuel M Learned
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:43
CPC Classifications
B; B42; B42C; B42C17/00; Y; Y10; Y10S; Y10S412/00; Y10S412/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1844516A
Cited
US2151957A
Cited
US2526987A
Cited
US2865285A
Cited
US2893023A
Cited
US3117330A
Cited
US3447496A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |