US3498938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistage,semicontinuous process for the emulsion polymerization of vinyl esters of alpha-branched monocarboxylic acids
Assignee: Shell USA Inc
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Filing: 1967-09-08
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Granted: 1970-03-03
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Expires: 1987-09-08
Abstract
No abstract record available.
Inventors
- 👤 Einte P Grommers
- 👤 Fritz T J Oeverhaus
- 👤 Jacobus J Tjepkema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:15
CPC Classifications
C; C08; C08F; C08F263/00; C08F263/02
Claims Analysis
Total Claims: 0
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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) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |