US2435521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loose-leaf book construction
Assignee: S E AND M VERNON Inc
•
Filing: 1944-02-04
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Granted: 1948-02-03
•
Expires: 1964-02-04
Abstract
No abstract record available.
Inventors
- 👤 Vernon Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:39
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/16; B42F13/20; B42F13/22; B42F13/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US458394A
Cited
US605717A
Cited
US991993A
Cited
US841705A
Cited
US1142643A
Cited
GB161383A
Cited
US1807390A
Cited
US2322180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-02 | 1951-08-04 | 1952-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-02 | 1955-08-04 | 1956-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-02 | 1959-08-04 | 1960-02-03 | $7700.00 | Window Closed / Lapsed |