US2280216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of impregnating fibrous materials
Assignee: Imperial Tobacco Company of Canada Ltd
•
Filing: 1939-05-05
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Granted: 1942-04-21
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Expires: 1959-05-05
Abstract
No abstract record available.
Inventors
- 👤 Campbell William Boyd
- 👤 Maass Otto
- 👤 Massey Ernest Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:38
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/66; D21H17/00; D21H17/03; D21H17/05; D21H17/11; D21H17/60; D21H23/32; D21H23/42
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) | 1945-04-20 | 1945-10-20 | 1946-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-04-20 | 1949-10-20 | 1950-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-04-20 | 1953-10-20 | 1954-04-21 | $7700.00 | Window Closed / Lapsed |