Patent US3772258A successfully refreshed from Google Patents.
US3772258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of acrylic acid esters
Assignee: Texaco Inc
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Filing: 1971-10-13
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Granted: 1973-11-13
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Expires: 1991-10-13
Abstract
Abstract VINYL MONOMERS OF THE TYPE EXEMPLIFIED BY THE ALKYL METHACRYLATES ARE FIRST CONTACTED WITH DINITROGEN TETROXIDE AND THE THUS-TREATED ALKYL METHACRYLATE HEATED TO A TEMPERATURE OF FROM ABOUT 50 TO ABOUT 140*C. TO EFFECT POLYMERIZATION OF THE METHACRYLATE.
Inventors
- 👤 D Lachowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:37
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; Y; Y10; Y10S; Y10S260/00; Y10S260/43
Claims Analysis
Total Claims: 0
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |