Patent US3174029A successfully refreshed from Google Patents.
US3174029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leader sheet identification
Assignee: International Business Machines Corp
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Filing: 1959-10-26
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Granted: 1965-03-16
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 James M Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:20
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/06009
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
THE METHOD OF SELECTIVELY DISTINGUISHING BETWEEN LEADER AND DETAIL DOCUMENTS COMPRISING, PROVIDING EACH DETAIL DOCUMENT WITH A CHARACTERISTIC IDENTIFYING MARK LOCATED IN ONE COLUMN IN A PREDETERMINED RELATION TO A PARTICULAR ONE OF A PLURALITY OF SPACED COMMUTATOR MARKS IN ANOTHER COLUMN ALONG AN EDGE OF THE DOCUMENT, SENSING SUCH MARK RELATIVE TO THE PARTICULAR COMMUTATOR MARK TO IDENTIFY THE DETAIL DOCUMENT, AND PROVIDING A DOMINATING MARK ON THE LEADER DOCUMENT SO POSITIONED IN SAID ONE COLUMN AS TO HAVE ITS LEADING EDGE LOCATED BEFORE THE START OF THE CORRESPONDING DETAIL MARK AND EXTENDING AFTER THE END OF SUCH MARK TO COMPLETELY OBLITERATE AND PREVENT THE POSSIBILITY OF DETAIL MARK THEREON BEING RECOGNIZED.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |