Patent US2805176A successfully refreshed from Google Patents.
US2805176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireproofing regenerated cellulose
Assignee: ROBERT S ROBE
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Filing: 1952-09-10
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Granted: 1957-09-03
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Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Francis J Mulligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:17
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE MANUFACTURE OF FLAME-RESISTANT VISCOSE CELLULOSE MATERIAL, THE STEPS OF ESTABLISHING A REGENERATED VISCOSE CELLULOSE FIBER CONTAINING THEREIN REACTIVE CELLULOSE MATERIAL HAVING A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF CARBOXY METHYL, GLYCEROL ETHER AND CARBOXY ETHYL, SAID REACTIVE GROUP BEING PRESENT IN AN AMOUNT PROVIDING REACTIVE CELLULOSE AS ONLY A MINOR PART OF THE CELLULOSE CONTENT OF THE FIBER, INTRODUCING WITHIN SAID FIBER, WHILE THE FIBER IS MAINTAINED IN UNDRIED CONDITION, A COMPOUND OF A METAL WHICH HAS FLAME-PROOFING PROPERTIES AND WHICH IS ADAPTED TO REACT WITH SAID SELECTED REACTIVE GROUP, AND REACTING SAID COMPOUND WITH THE SELECTED GROUP TO PRODUCE AN INSOLUBLE COMPOUND OF THE METAL EMBODIED WITHIN SAID CELLULOSE FIBER.
Claim 2
Dependent Claim
115 words
IN THE MANUFACTURE OF FLAME-RESISTANT VISCOSE CELLULOSE MATERIAL, THE STEPS OF ESTABLISHING A REGENERATED VISCOSE CELLULOSE FIBER CONTAINING THEREIN REACTIVE CELLULOSE MATERIAL HAVING A REACTIVE GROUP SELECTED FROM THE CLASS CONSISTING OF CARBOXY METHYL, GLYCEROL ETHER AND CARBOXY ETHYL, SAID REACTIVE GROUP BEING PRESENT IN AN AMOUNT PROVIDING REACTIVE CELLULOSE AS ONLY A MINOR PART OF THE CELLULOSE CONTENT OF THE FIBER, INTRODUCING WITHIN SAID FIBER, WHILE THE FIBER IS MAINTAINED IN UNDRIED CONDITION, A COMPOUND OF A METAL WHICH HAS FLAME-PROOFING PROPERTIES AND WHICH IS ADAPTED TO REACT WITH SAID SELECTED REACTIVE GROUP, AND REACTING SAID COMPOUND WITH THE SELECTED GROUP TO PRODUCE AN INSOLUBLE COMPOUND OF THE METAL EMBODIED WITHIN SAID CELLULOSE FIBER.
References Cited (Backward Citations)
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |