US3707552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of thioglycollic and mercapto propionic acid
Assignee: Novartis AG
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Filing: 1970-06-10
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Granted: 1972-12-26
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Expires: 1990-06-10
Abstract
Abstract A POLYTHIOL OF THE FORMULA G-(CH2-CH(-CH2-SH)-(O-R1)E-OOC-R2-SH)D WHEREIN G REPRESENTS A RADICAL OBTAINED BY REMOVAL OF D ACTIVE HYDROGEN ATOMS, FROM A COMPOUND HAVING AT LEAST D ACTIVE HYDROGEN ATOMS, R1 REPRESENTS AN ALKYLENE GROUP CONTAINING TWO OR MORE CARBON ATOMS, R2 REPRESENTS A DIVALENT ORGANIC RESIDUE, E IS ZERO OR A POSITIVE INTEGER, AND D IS AN INTEGER OF A LEAST 1 WHICH ARE INTERMEDIATES FOR THE PREPARATION OF CURING AGENTS USEFUL AS SEALANTS, CAULKING AGENTS AND CABLE JOINTING AGENTS.
Inventors
- 👤 Bryan Dobinson
- 👤 Bernard Peter Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:04
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C07; C07C; C07C323/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |