US2818407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Osmium tetroxide accelerator for the peroxide initiated polymerization of polymerizable organic compounds
Assignee: Hercules Powder Co
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Filing: 1954-12-30
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Granted: 1957-12-31
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Expires: 1974-12-30
Abstract
No abstract record available.
Inventors
- 👤 Paul H Aldrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:25
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN THE POLYMERIZATION OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER, THE IMPROVEMENT WHICH COMPRISES BRINGING SAID MONOMER INTO CONTACT WITH A PEROXIDE AND OSMIUM TETROXIDE, THE OSMIUM TETROXIDE BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF 0.1 TO 200 P.P.M. BASED ON THE WEIGHT OF MONOMER TO PROVIDE MORE RAPID POLYMERIZATION THAN OBTAINABLE WITH THE PEROXIDE ALONE.
Claim 2
Dependent Claim
57 words
IN THE POLYMERIZATION OF A POLYMERIZABLE ETHYLENICALLY UNSATURATED MONOMER, THE IMPROVEMENT WHICH COMPRISES BRINGING SAID MONOMER INTO CONTACT WITH A PEROXIDE AND OSMIUM TETROXIDE, THE OSMIUM TETROXIDE BEING PRESENT IN AN AMOUNT WITHIN THE RANGE OF 0.1 TO 200 P.P.M. BASED ON THE WEIGHT OF MONOMER TO PROVIDE MORE RAPID POLYMERIZATION THAN OBTAINABLE WITH THE PEROXIDE ALONE.
References Cited (Backward Citations)
US2451180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |