Patent US3517480A successfully refreshed from Google Patents.
US3517480A
Expired / Lapsed
US
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Apparatus for making loose granular filters
Assignee: RJ Reynolds Tobacco Co
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Filing: 1968-02-14
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Granted: 1970-06-30
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Expires: 1988-02-14
Abstract
No abstract record available.
Inventors
- 👤 Jesse R Pinkham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:49
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0204; A24D3/0212; A24D3/0225
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1716009A
Cited
US2200577A
Cited
US2643496A
Cited
US2621841A
Cited
US2993317A
Cited
US2739432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |