US2999830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition comprising a refractory material and a polymethacrolein reaction product and method of production thereof
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1958-04-21
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Granted: 1961-09-12
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Expires: 1978-04-21
Abstract
No abstract record available.
Inventors
- 👤 Elbert E Gruber
- 👤 Edward F Kalafus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:56
CPC Classifications
C; C08; C08G; C08G2/00; C08G2/14; B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2206; C08F; C08F8/00; C08F8/42; C08F8/44; C08F8/48; C08G2/18; C08G2/30; C08G2/38; C08L; C08L59/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A COMPOSITION OF MATTER COMPRISING (1) A REFRACTORY MATERIAL AND (2) FROM 0.1 TO 10% BY WEIGHT OF SAID REFRACTORY MATERIAL OF AT LEAST ONE WATER SOLUBLE POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SELECTED FROM THE GROUP CONSISTING OF A HOMOPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF A AND A COPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF AT LEAST 70% A AND THE BALANCE B, WHERE A HAS THE FORMULA
Claim 2
Dependent Claim
76 words
A COMPOSITION OF MATTER COMPRISING (1) A REFRACTORY MATERIAL AND (2) FROM 0.1 TO 10% BY WEIGHT OF SAID REFRACTORY MATERIAL OF AT LEAST ONE WATER SOLUBLE POLYMERIC MATERIAL HAVING A MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SELECTED FROM THE GROUP CONSISTING OF A HOMOPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF A AND A COPOLYMER CONSISTING ESSENTIALLY OF RECURRING UNITS OF AT LEAST 70% A AND THE BALANCE B, WHERE A HAS THE FORMULA
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) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |