Patent US4340581A successfully refreshed from Google Patents.
US2909448A
Expired / Lapsed
US
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Salts of polyamine polyepoxide adducts and their use as curing agents for polyepoxides
Assignee: Shell Development Co
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Filing: 1955-03-07
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Granted: 1959-10-20
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Expires: 1975-03-07
Abstract
No abstract record available.
Inventors
- 👤 Carl W Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:25
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/55; C; C07; C07D; C07D303/00; C07D303/02; C08; C08G; C08G59/00; C08G59/18; C08G59/182; C08G59/184; Y; Y10; Y10S; Y10S8/00; Y10S8/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
36 words
A PROCESS FOR TREATING A WOOL CONTAINING FABRIC TO REDUCE ITS TENDENCY TO SHRINK AND IMPROVE ITS WATER REPELLENCY WHICH COMPRISES IMPREGNATING THE FABRIC WITH AN AQUEOUS MEDIUM CONTAINING A POLYETHER POLYEPOXIDE HAVING THE PLURALITY OF
References Cited (Backward Citations)
US2681901A
Cited
US2500600A
Cited
US2651589A
Cited
US2640037A
Cited
US2772248A
Cited
US2801229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-19 | 1963-04-20 | 1963-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-19 | 1967-04-20 | 1967-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-19 | 1971-04-20 | 1971-10-20 | $7700.00 | Window Closed / Lapsed |