US3397159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous solutions of salts of 1, 4-bis (2-hydroxypropyl)-2-methyl piperazine and epoxy ester-maleic anhydride adducts
Assignee: BASF Corp
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Filing: 1964-02-18
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Granted: 1968-08-13
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Expires: 1984-02-18
Abstract
No abstract record available.
Inventors
- 👤 William W Slater
- 👤 Lawrence E Thow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:06
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4423; C09D5/4426; C01; C01B; C01B25/00; C01B25/16; C01B25/18; C01B25/22; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4207; C08G59/4292; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |