US3091046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flip file cards
Assignee: Individual
•
Filing: 1960-07-05
•
Granted: 1963-05-28
•
Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Engelstein Harold
- 👤 Engelstein Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
B; B42; B42F; B42F19/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
A FLIP FILE CARD PROVIDED WITH TRANSPARENT ENVELOPES IN STAGGERED RELATION HINGED TO A BACKING, EACH ENVELOPE BEING CONSTITUTED BY TWO IDENTICAL SUPERPOSED PANELS OF FLEXIBLE MATERIAL FORMED BY FOLDING A SHEET IN HALF AND JOINING THE ENDS THEREOF A RIB, AND A STRIP INTERPOSED BETWEEN THE TWO PANELS IN PARALLEL WITH AND ADJACENT SAID RIB, SAID STRIP BEING JOINED BY A SPACER ELEMENT TO THE UNDERSIDE OF THE TOP PANEL TO PROVIDE A LEDGE FOR SUPPORTING THE LOWER MARGIN OF OF AN ITEM INSERTED BETWEEN SAID PANELS, THE SPACE BETWEEN SAID SPACER ELEMENT AND SAID RIB OF SAID PANELS PROVIDING A WINDOW FOR AN INDEXING STRIP WHICH MAY BE READILY INSERTED IN THE LARGER CHAMBER BETWEEN THE TWO PANELS.
References Cited (Backward Citations)
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Cited
US1580127A
Cited
US1987377A
Cited
US2096559A
Cited
US2576272A
Cited
US2610421A
Cited
US2775050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |