Patent US2958613A successfully refreshed from Google Patents.
US2958613A
Expired / Lapsed
US
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Water- and oil-repellency agents and process of making same
Assignee: EIDP Inc
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Filing: 1959-01-21
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Granted: 1960-11-01
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Expires: 1979-01-21
Abstract
No abstract record available.
Inventors
- 👤 Jerry A Nelson
- 👤 Thomas G Miller
- 👤 Kenneth C Smeltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:46
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/564; D06M15/568; D06M13/00; D06M13/322; D06M13/402; D06M13/425; D06M13/428
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A COMPOUND BEING THE REACTION PRODUCT, PRODUCED UNDER STRONGLY ACID CONDITIONS, OF FORMALDEHYDE WITH A CARBAMATE OF THE STRUCTURE
Claim 2
Dependent Claim
19 words
A COMPOUND BEING THE REACTION PRODUCT, PRODUCED UNDER STRONGLY ACID CONDITIONS, OF FORMALDEHYDE WITH A CARBAMATE OF THE STRUCTURE
References Cited (Backward Citations)
US2593737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |