US3253937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tall oil pitch size and its preparation and use
Assignee: Tenneco Chemicals Inc
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Filing: 1961-11-28
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Granted: 1966-05-31
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Expires: 1981-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph H Stump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:51
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
47 words
A LIQUID TALL OIL PITCH-FORMALDEHYDE SIZE CONTAINING FROM 60-80% OF SIZE SOLIDS, SAID SIZE SOLIDS BEING THE SODIUM-SAPONIFICATION PRODUCT OF THE MATERIAL RESULTING FROM THE REACTION OF TALL OIL PITCH WITH FROM 1% TO 6% BY WEIGHT OF FORMALDEHYDE, SAID PRODUCT HAVING AN ACID NUMBER BELOW 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |