Patent US3756889A successfully refreshed from Google Patents.
US3756889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glue fastening of superimposed leaves
Assignee: Service Business Forms Inc
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Filing: 1971-12-20
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Granted: 1973-09-04
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Expires: 1991-12-20
Abstract
Abstract A method of producing continuous and snap-out business forms, consisting of a plurality of properly aligned, superimposed sheets, cross perforated and interleaved with carbon paper, and especially adapted for use in data processing printers, wherein the glue lines are continuous, uniform and of minimal width and thickness, eliminating undue bulkiness and rigidity, and assuring complete and effective bonding throughout the length of the sheets.
Inventors
- 👤 L Wolfberg
- 👤 J Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:28
CPC Classifications
B; B42; B42C; B42C3/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056; Y10T156/1057; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1722; Y10T156/1727; Y10T156/1732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |