Patent US2875182A successfully refreshed from Google Patents.
US2875182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polysulfide polymers
Assignee: ATK Launch Systems LLC
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Filing: 1955-03-09
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Granted: 1959-02-24
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Expires: 1975-03-09
Abstract
No abstract record available.
Inventors
- 👤 Edward M Fettes
- 👤 Eugene R Bertozzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C08G75/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF MAKING A POLYMERCAPTOPOLYSULFIDE POLYMER WHICH COMPRISES REACTING AT LEAST ON AQUEOUS THIOSULFATE OF THE FORMULA R(SSO3NA)N WHEREIN R 1 SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON AND OXAHYDROCARBON GROUPS AND N HAS A VALUE OF 2-4, WITH A MICTURE OF OF ALKALINE SULFIDE AND HYDROSULFIDE CONTAINING FROM 0 05 TO 2.0 MOLS OF HYDROSULFIDE PER MOL OF SULFIDE, THE RELATIVE AMOUNTS OF THIOSULFATE AND ALKALINE SULFIDE BEING SUCH THAT FROM 1 TO 2 MOLECULES OF ALKALINE SULFIDE REACT WITH EACH TWO MOLECULES OF THOSULFATE TO CAUSE A LIQUID POLYTHIOPOLYMERCAPTAN HAVING A MOLECULAR WEIGHT OF 1000 TO 50,000 TO SEPARATE AS A CONTINUOUS NON-AQUEOUS PHASE.
Claim 2
Independent Claim
108 words
THE METHOD OF MAKING A POLYMERCAPTOPOLYSULFIDE POLYMER WHICH COMPRISES REACTING AT LEAST ON AQUEOUS THIOSULFATE OF THE FORMULA R(SSO3NA)N WHEREIN R 1 SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON AND OXAHYDROCARBON GROUPS AND N HAS A VALUE OF 2-4, WITH A MICTURE OF OF ALKALINE SULFIDE AND HYDROSULFIDE CONTAINING FROM 0 05 TO 2.0 MOLS OF HYDROSULFIDE PER MOL OF SULFIDE, THE RELATIVE AMOUNTS OF THIOSULFATE AND ALKALINE SULFIDE BEING SUCH THAT FROM 1 TO 2 MOLECULES OF ALKALINE SULFIDE REACT WITH EACH TWO MOLECULES OF THOSULFATE TO CAUSE A LIQUID POLYTHIOPOLYMERCAPTAN HAVING A MOLECULAR WEIGHT OF 1000 TO 50,000 TO SEPARATE AS A CONTINUOUS NON-AQUEOUS PHASE.
References Cited (Backward Citations)
US2363614A
Cited
US2402977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |