Patent US3429522A successfully refreshed from Google Patents.
US3429522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming tube for glass fibers
Assignee: Sonoco Products Co
•
Filing: 1965-08-13
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Granted: 1969-02-25
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Expires: 1985-08-13
Abstract
No abstract record available.
Inventors
- 👤 Mccleery B Cunningham
- 👤 Charles K Dunlap Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:50
CPC Classifications
B; B31; B31C; B31C3/00; B65; B65H; B65H81/00; B65H81/06; B65H81/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129478A
Cited
US2623445A
Cited
US2723705A
Cited
US2751936A
Cited
US2760549A
Cited
US3226799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |