US2665206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sizing of fibrous materials and compositions useful for sizing and for other purposes
Assignee: Shell Development Co
•
Filing: 1948-06-15
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Granted: 1954-01-05
•
Expires: 1968-06-15
Abstract
No abstract record available.
Inventors
- 👤 Theodore F Bradley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:43
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/62; D06; D06M; D06M13/00; D06M13/02; D06M15/00; D06M15/01; D06M15/17; D21H17/03; D21H17/04; D21H17/05; D21H17/14; C; C09; C09K; C09K23/00; C09K23/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
CELLULOSE FIBERS HAVING THE SURFACES THEREOF COATED WITH A PRECIPITATE OF A CYCLIC EXTRACT OF PREDOMINANTLY AROMATIC AND NAPHTHENIC NATURE FROM A MINERAL OIL, TOGETHER WITH FROM ABOUT 3 TO 75% OF NAPHTHENATE SALTS DERIVED FROM NAPHTHENIC ACIDS HAVING AN AVERAGE ACID NUMBER OF BETWEEN 100 AND 200, SAID PERCENTAGE BEING BASED ON THE TOTAL WEIGHT OF NAPHTHENATES AND EXTRACT PRESENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |