US2616822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection of cellulose fiber against heat aging
Assignee: Uniroyal Inc
•
Filing: 1949-09-14
•
Granted: 1952-11-04
•
Expires: 1969-09-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur C Danielson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:30
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/432; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31826; Y10T428/31841
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
THE METHOD OF IMPROVING THE RESISTANCE OF CELLULOSE FIBERS TO THE DETERIORATING EFFECT OF HEAT AGING WHICH COMPRISES INCORPORATING GUANIDINE CARBONATE AS SUCH IN THE FIBER, IN AMOUNT OF FROM 0.25% TO 10.0% ON THE WEIGHT OF THE FIBER.
Claim 2
Independent Claim
39 words
THE METHOD OF IMPROVING THE RESISTANCE OF CELLULOSE FIBERS TO THE DETERIORATING EFFECT OF HEAT AGING WHICH COMPRISES INCORPORATING GUANIDINE CARBONATE AS SUCH IN THE FIBER, IN AMOUNT OF FROM 0.25% TO 10.0% ON THE WEIGHT OF THE FIBER.
References Cited (Backward Citations)
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Cited
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Cited
US2288810A
Cited
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Cited
GB587366A
Cited
US2436181A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |