Patent US2795567A successfully refreshed from Google Patents.
US2795567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical product
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-04-14
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Granted: 1957-06-11
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Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Robert A Ruehrwein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:56
CPC Classifications
C; C04; C04B; C04B33/00; C04B33/02; C04B33/13; C04B33/1305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A FINELY DIVIDED REACTION PRODUCT OF A HIGH SURFACE AREA HYDROPHILIC SUBSTANCE POSSESSING ION EXCHANGE PROPERTIES WITH AT LEAST 3 WEIGHT PERCENT OF A CATIONIC SYNTHETIC HIGH POLOYMER CONTAINING A SUBSTANTIALLY LINEAR MOLECULAR CHAIN DERIVED BY THE POLYMERIZATION OF AT LEAST ONE MONOOLEFINIC COMPOUND THROUGH ALIPHATIC UNSATURATION.
Claim 2
Dependent Claim
47 words
A FINELY DIVIDED REACTION PRODUCT OF A HIGH SURFACE AREA HYDROPHILIC SUBSTANCE POSSESSING ION EXCHANGE PROPERTIES WITH AT LEAST 3 WEIGHT PERCENT OF A CATIONIC SYNTHETIC HIGH POLOYMER CONTAINING A SUBSTANTIALLY LINEAR MOLECULAR CHAIN DERIVED BY THE POLYMERIZATION OF AT LEAST ONE MONOOLEFINIC COMPOUND THROUGH ALIPHATIC UNSATURATION.
References Cited (Backward Citations)
US2129694A
Cited
US2563897A
Cited
US2700029A
Cited
US2656339A
Cited
US2650200A
Cited
US2625529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |