US3616819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spirally wound paper tube
Assignee: Sonoco Products Co
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Filing: 1969-03-25
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Granted: 1971-11-02
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Expires: 1989-03-25
Abstract
Abstract A SPIRALLY WOUND PAPER TUBE INCLUDING A RELATIVELY NARROW STRIP OF PAPER SPIRALLY WOUND IN UNDERLYING RELATIONSHIP WITH A RELATIVELY WIDE PAPER STRIP WITH ADHERSIVE THEREBETWEEN AND WITH THE SPIRAL SEAM OF THE RELATIVELY WIDE PAPER STRIP POSITIONED APPROXIMATELY INTERMRDIATE THE SIDE EDGES OF THE NARROW STRIP.
Inventors
- 👤 Charles K Dunlap Jr
- 👤 James A Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:48
CPC Classifications
B; B31; B31C; B31C3/00; F; F16; F16L; F16L9/00; F16L9/16; B29; B29C; B29C65/00; B29C65/48; B29C65/50; B29C65/5042; B29C65/5092; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/4329; B29C66/50; B29C66/61
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |