Patent US2553982A successfully refreshed from Google Patents.
US2553982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of polymerizing phenolcontaining vinylidene chloride
Assignee: Dow Chemical Co
•
Filing: 1949-03-07
•
Granted: 1951-05-22
•
Expires: 1969-03-07
Abstract
No abstract record available.
Inventors
- 👤 Theodore W Sarge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF POLYMERIZING MONOMERIC VINYLIDENE CHLORIDE CONTAINING POLYMERIZATION INHIBITING AMOUNTS OF A PHENOL WHICH CONSISTS ESSENTIALLY IN MIXING WITH SUCH MONOMER, A COMPOUND FROM THE CLASS CONSISTING OF ACETIC ANHYDRIDE AND ACETYL CHLORIDE, IN AMOUNT AT LEAST EQUIVALENT TO THE PHENOL PRESENT, AND SUBJECTING THE MIXTURE TO TEMPERATURE CONDITIONS KNOWN TO INDUCE POLYMERIZATION OF THE UNINHIBITED MONOMER, KEEPING THE SAID MIXTURE ANHYDROUS AT LEAST UNTIL POLYMERIZATION HAS STARTED.
Claim 2
Independent Claim
69 words
THE METHOD OF POLYMERIZING MONOMERIC VINYLIDENE CHLORIDE CONTAINING POLYMERIZATION INHIBITING AMOUNTS OF A PHENOL WHICH CONSISTS ESSENTIALLY IN MIXING WITH SUCH MONOMER, A COMPOUND FROM THE CLASS CONSISTING OF ACETIC ANHYDRIDE AND ACETYL CHLORIDE, IN AMOUNT AT LEAST EQUIVALENT TO THE PHENOL PRESENT, AND SUBJECTING THE MIXTURE TO TEMPERATURE CONDITIONS KNOWN TO INDUCE POLYMERIZATION OF THE UNINHIBITED MONOMER, KEEPING THE SAID MIXTURE ANHYDROUS AT LEAST UNTIL POLYMERIZATION HAS STARTED.
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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |