US3438807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone sized paper and cellulosic fiber
Assignee: Union Carbide Corp
•
Filing: 1965-12-15
•
Granted: 1969-04-15
•
Expires: 1985-12-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Pikula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:05
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/59; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2964; Y10T428/2965; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA529283A
Cited
US1706840A
Cited
US2507200A
Cited
US2544342A
Cited
US2535239A
Cited
GB689604A
Cited
US2646373A
Cited
US3046160A
Cited
GB908988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |