US3377220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making stable elongated elements
Assignee: Filtrona Richmond Inc
•
Filing: 1967-06-09
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Granted: 1968-04-09
•
Expires: 1987-06-09
Abstract
No abstract record available.
Inventors
- 👤 Richard M Berger
- 👤 Reavis C Sproull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:16
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/02; A24D3/0229; A24D3/0233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2544019A
Cited
US2796810A
Cited
US2805671A
Cited
US2923034A
Cited
US3144025A
Cited
US3230287A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |