US2940958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing polysulfide polymer with chromates and hydrous salts
Assignee: ATK Launch Systems LLC
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Filing: 1956-07-06
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Granted: 1960-06-14
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Expires: 1976-07-06
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:42
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
COMPOSITION CONSISTING ESSENTIALLY OF A LIQUID, POLYMERIZABLE, SUBSTANTIALY ANHYDROUS POLYTHIOPOLYMERCAPTAN POLYMER COMPOSED OF-SS-UNITS LINKED BY MEMBERS OF THE GROUP CONSISTING OF DIVALENT HYDROCARBON, OXAHYDROCARBON AND THIAHYDROCARBON GROUPS IN A LINEAR CHAIN AND CONTAINING BETWEEN ABOUT 1.25 AND ABOUT THREE PARTS BY WEIGHT, PER TEN PARTS POLYTHIOPOLYMERCAPTAN, OF A CURING COMPOSITION COMPRISING A CHROMATE AND A HYDROUS SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM TETRABORATE, AMMONIUM BIBORATE, COBALTOUS CHLORIDE, CHROMIUM CHLORIDE, BARIUM CHLORIDE, CALCIUM PHOSPHATE, AMMONIUM TUNGSTATE AND CALCIUM FERROCYANIDE.
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |