US2978432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polymers and copolymers containing methylolether groups
Assignee: Bayer AG
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Filing: 1955-06-30
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Granted: 1961-04-04
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Expires: 1975-06-30
Abstract
No abstract record available.
Inventors
- 👤 Graulich Wilhelm
- 👤 Karl E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:01
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; C08F22/00; C08F22/36; C08F220/00; C08F220/02; C08F220/42; C08F8/00; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/285; D06M15/29; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS OF PRODUCING AN ESSENTIALLY LINEAR POLYMER HAVING ETHERIFIED METHYLOL GROUPS WHICH COMPRISES POLYMERIZING AT TEMPERATURES NOT SURPASSING ABOUT 60*C. IN A NEUTRAL TO WEAKLY ALKALINE MEDIUM, AND ETHYLENICALLY UNSATURATED ORGANIC COMPOUND CONTAINING THE GROUP OF THE FORMULA:
Claim 2
Dependent Claim
39 words
A PROCESS OF PRODUCING AN ESSENTIALLY LINEAR POLYMER HAVING ETHERIFIED METHYLOL GROUPS WHICH COMPRISES POLYMERIZING AT TEMPERATURES NOT SURPASSING ABOUT 60*C. IN A NEUTRAL TO WEAKLY ALKALINE MEDIUM, AND ETHYLENICALLY UNSATURATED ORGANIC COMPOUND CONTAINING THE GROUP OF THE FORMULA:
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) | 1964-04-03 | 1964-10-03 | 1965-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-03 | 1968-10-03 | 1969-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-03 | 1972-10-03 | 1973-04-04 | $7700.00 | Window Closed / Lapsed |