US3397082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Parerboard base impregnated with pitch or a blend of pitch and hydrocarbon polymer resin
Assignee: Sinclair Research Inc
•
Filing: 1967-04-04
•
Granted: 1968-08-13
•
Expires: 1987-04-04
Abstract
No abstract record available.
Inventors
- 👤 Podlipnik John
- 👤 Theodore J Karr
- 👤 Eugene M Fauber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:36
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/61; D21H17/20; D21H17/33; D21H17/34; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2033885A
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US2029288A
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US2215245A
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GB533965A
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US2462593A
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US2723923A
Cited
US2754728A
Cited
US2840138A
Cited
US2954313A
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US2972588A
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US3288701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |