US3248376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vinyl polymerization in the presence of phosphine compounds as oxygen removers
Assignee: Gillette Co LLC
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Filing: 1962-12-27
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Granted: 1966-04-26
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Expires: 1982-12-27
Abstract
No abstract record available.
Inventors
- 👤 Aubrey D Jenkins
- 👤 Leszek J Wolfram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:49
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/04; C08F2/06; C08F2/12; C08F2/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN THE METHOD OF CARRYING OUT A FREE RADICAL INITIATED POLYMERIZATION OF A VINYL MONOMER SUBJECT TO OXYGEN INHIBITION, THE STEP WHICH COMPRISES POLYMERIZING SAID MONOMER IN THE PRESENCE OF A MEMBER OF THE CLASS CONSISTING OF TRIS (HYDROXYMETHYL) PHOSPHINE AND TETRAKIS (HYDROXYMETHYL) PHOSPHONIUM CHLORIDE IN AN AMOUNT UP TO 1% BY WEIGHT OF SAID MONOMER.
Claim 2
Dependent Claim
56 words
IN THE METHOD OF CARRYING OUT A FREE RADICAL INITIATED POLYMERIZATION OF A VINYL MONOMER SUBJECT TO OXYGEN INHIBITION, THE STEP WHICH COMPRISES POLYMERIZING SAID MONOMER IN THE PRESENCE OF A MEMBER OF THE CLASS CONSISTING OF TRIS (HYDROXYMETHYL) PHOSPHINE AND TETRAKIS (HYDROXYMETHYL) PHOSPHONIUM CHLORIDE IN AN AMOUNT UP TO 1% BY WEIGHT OF SAID MONOMER.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |