US3191604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet lifters for loose leaf binders
Assignee: Esselte Pendaflex Corp
•
Filing: 1963-09-26
•
Granted: 1965-06-29
•
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 04:20
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
Cited
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 |