Patent US3191604A successfully refreshed from Google Patents.
US3191604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet lifters for loose leaf binders
Assignee: Esselte Pendaflex Corp
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Filing: 1963-09-26
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Granted: 1965-06-29
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Expires: 1983-09-26
Abstract
No abstract record available.
Inventors
- 👤 Wance Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:12
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/40; B42F13/408
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A BINDER HAVING A RING MOUNTING INCLUDING AN ELONGATED HOUSING FROM WHICH THE RINGS PROJECT, A PAIR OF SHEET LIFTERS HAVING ENDS PIVOTALLY FITTED IN THE OPPOSITE ENDS OF THE HOUSING, THE BINDER INCLUDING A STACK OF SHEETS MAINTAINED ON THE RINGS BETWEEN THE SHEET LIFTERS, EACH OF THE LIFTERS BEING FORMED WITH A LOOP ENCIRCLING ONE OF THE RINGS OF THE BINDER, EACH OF THE LOOPS BEING PROVIDED WITH A FINGER SLIDABLY FITTED ON IT AND HAVING A PROJECTION EXTENDING BEHIND THE SHEETS, EACH OF THE FINGERS HAVING A PART SLIDABLY GUIDED ON THE RING SO THAT THE FINGER IS
References Cited (Backward Citations)
GB191328370A
Cited
CH90966A
Cited
FR650263A
Cited
US1751589A
Cited
DE528142C
Cited
DE639123C
Cited
US2163856A
Cited
US2273187A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |