Patent JPS641450A successfully refreshed from Google Patents.
US2831833A
Expired / Lapsed
US
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Acrylamide derivatives, their polymers and methods of producing them
Assignee: Rohm and Haas Co
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Filing: 1955-07-18
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Granted: 1958-04-22
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Aycock
- 👤 Elinor M Hankins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:30
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D239/08; C07D239/10; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D233/36; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COMPOSITION OF MATTER COMPRISING A COMPOUND OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A COMPOSITION OF MATTER COMPRISING A COMPOUND OF THE FORMULA:
References Cited (Backward Citations)
US2727016A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |