Patent US2955015A successfully refreshed from Google Patents.
US2955015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Graft polymerization of certain esters of acrylic acid with cellulose substrate
Assignee: Wyeth Holdings LLC
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Filing: 1957-06-05
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Granted: 1960-10-04
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Expires: 1977-06-05
Abstract
No abstract record available.
Inventors
- 👤 Nicholas R Segro
- 👤 Jr John H Daniel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/18; D21H17/19; C; C08; C08B; C08B15/00; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR CHEMICALLY MODIFYING PAPER COMPRISING REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYL ACRYLATE, PROPYL ACRYLATE AND BUTYL ACRYLATE WITH A PAPER SUBSTRATE COMPOSED PREDOMINANTLY OF CELLULOSE FIBERS IN AN AQUEOUS MEDIUM AT A PH NOT GREATER THAN 3.5 IN THE PRESENCE OF A CERIC SALT WHICH IS SOLUBLE IN AT LEAST ONE COMPONENT OF THE REACTION MEDIUM UNTIL THE WEIGHT OF THE SAID ACRYLATE COMBINED WITH SAID SUBSTRATE IS BETWEEN ABOUT 100% AND 900% BASED ON THE WEIGHT OF THE SUBSTRATE.
Claim 2
Dependent Claim
86 words
A PROCESS FOR CHEMICALLY MODIFYING PAPER COMPRISING REACTING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ETHYL ACRYLATE, PROPYL ACRYLATE AND BUTYL ACRYLATE WITH A PAPER SUBSTRATE COMPOSED PREDOMINANTLY OF CELLULOSE FIBERS IN AN AQUEOUS MEDIUM AT A PH NOT GREATER THAN 3.5 IN THE PRESENCE OF A CERIC SALT WHICH IS SOLUBLE IN AT LEAST ONE COMPONENT OF THE REACTION MEDIUM UNTIL THE WEIGHT OF THE SAID ACRYLATE COMBINED WITH SAID SUBSTRATE IS BETWEEN ABOUT 100% AND 900% BASED ON THE WEIGHT OF THE SUBSTRATE.
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) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |