Patent US2491528A successfully refreshed from Google Patents.
US2491528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making binders
Assignee: Plastic Binding Corp
•
Filing: 1946-11-12
•
Granted: 1949-12-20
•
Expires: 1966-11-12
Abstract
No abstract record available.
Inventors
- 👤 Philip V Spinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:23
CPC Classifications
B; B42; B42B; B42B5/00; B42B5/08; B42B5/10; B26; B26D; B26D1/00; B29; B29C; B29C67/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |