US4291900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indexed book
Assignee: Individual
•
Filing: 1979-11-14
•
Granted: 1981-09-29
•
Expires: 1999-11-14
Abstract
Abstract We provide an indexed book such as a dictionary, divided up into different alphabetical sections, the pages of each section having a cut-out for viewing the initial letter of all the words in that section and an elongate slot above which is printed the second and third letters of the words printed on that page. The height of the slots are arranged so that the second and third letters printed on one page appear just below the upper edge of the slot in the previous page.
Inventors
- 👤 C. T. Feng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:48
CPC Classifications
B; B42; B42F; B42F21/00; B42F21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A book having contents arranged in alphabetical order, characterized by that each leaf has two discrete specific zones on the opening margin of one side revealing the first letter of the indexed terms alphabetically arranged in this page, and the second and third letter of the last indexed term in this page; each of said leaves of said book being so structured and said portions being so positioned that both said zones can be seen easily without opening said book.
Claim 2
Dependent Claim
80 words
A book having contents arranged in alphabetical order, characterized by that each leaf has two discrete specific zones on the opening margin of one side revealing the first letter of the indexed terms alphabetically arranged in this page, and the second and third letter of the last indexed term in this page; each of said leaves of said book being so structured and said portions being so positioned that both said zones can be seen easily without opening said book.
References Cited (Backward Citations)
US197345A
Cited
US433223A
Cited
US779525A
Cited
US955735A
Cited
GB698252A
Cited
US3282268A
Cited
US3877729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |