US2728748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide polymers
Assignee: ATK Launch Systems LLC
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Filing: 1952-10-27
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Granted: 1955-12-27
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Expires: 1972-10-27
Abstract
No abstract record available.
Inventors
- 👤 Franklin O Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:20
CPC Classifications
G; G21; G21K; G21K5/00; G21K5/10; C; C08; C08G; C08G75/00; C08G75/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
PROCESS OF MAKING A POLYSULFIDE POLYMER HAVING THE GENERAL FORMULA (FR"S)2(SRS)X, WHERE F IS A MEMBER OF THE GROUP CONSISTING OF HYDROXYL AND HALOGEN, R IS THE BIVALENT RADICAL -R''''''OCH2OR'''''' - HAVING ONLY TWO SULFUR CONNECTED VALENCES AND R" IS A BIVALENT RADICAL OF THE GROUP CONSISTING OF THE RADICAL -R''''''OCH2OR'''''' AND THEALKYLENE RADICAL -R''''''-, S BEING SULFUR, X VARYING FROM 2 TO 200, WHICH COMPRISES REACTING A GLYCOL OF THE FORMULA HOR''''''SSR''''''OH, FORMALDEHYDE AND A DICHLOR DIALKYLENE FORMAL HAVING THE FORMULA
Claim 2
Dependent Claim
82 words
PROCESS OF MAKING A POLYSULFIDE POLYMER HAVING THE GENERAL FORMULA (FR"S)2(SRS)X, WHERE F IS A MEMBER OF THE GROUP CONSISTING OF HYDROXYL AND HALOGEN, R IS THE BIVALENT RADICAL -R''''''OCH2OR'''''' - HAVING ONLY TWO SULFUR CONNECTED VALENCES AND R" IS A BIVALENT RADICAL OF THE GROUP CONSISTING OF THE RADICAL -R''''''OCH2OR'''''' AND THEALKYLENE RADICAL -R''''''-, S BEING SULFUR, X VARYING FROM 2 TO 200, WHICH COMPRISES REACTING A GLYCOL OF THE FORMULA HOR''''''SSR''''''OH, FORMALDEHYDE AND A DICHLOR DIALKYLENE FORMAL HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |