US3067816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and process for the manufacture of paper
Assignee: Unifrax I LLC
•
Filing: 1960-01-20
•
Granted: 1962-12-11
•
Expires: 1980-01-20
Abstract
No abstract record available.
Inventors
- 👤 William E Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:02
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/48; D21F1/52; D21F1/523
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US128469A
Cited
US1644867A
Cited
US1703010A
Cited
US2215572A
Cited
US2637091A
Cited
US2602714A
Cited
GB770832A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |