Patent US3689565A successfully refreshed from Google Patents.
US3689565A
Expired / Lapsed
US
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{60 -methylolbenzoin ethers
Assignee: Individual
•
Filing: 1970-05-04
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Granted: 1972-09-05
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Expires: 1990-05-04
Abstract
Abstract Alpha -METHYLOLBENZOIN ETHERS, THEIR PRODUCTION AND THEIR USE AS PHOTOINITIATORS.
Inventors
- 👤 Horst Hoffmann
- 👤 Heinrich Hartmann
- 👤 Carl Heinrich Krauch
- 👤 Otto Volkert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:31
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; C; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/76; C07C49/84; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/118; Y10S430/119
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
An Alpha -methylolbenzoin ether having the formula given in claim 1 in which R denotes an alkyl radical having one to four carbon atoms or an alkoxyalkyl radical having one to four carbon atoms.
Claim 2
Dependent Claim
16 words
An Alpha -methylolbenzoin ether having the formula given in claim 1 in which R denotes methyl.
References Cited (Backward Citations)
US2367661A
Cited
US2722512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |