US3640965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic sulfur-containing polymers
Assignee: Union Carbide Corp
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Filing: 1968-10-02
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Granted: 1972-02-08
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Expires: 1988-10-02
Abstract
Abstract POLYMERS ARE DISCLOSED THAT CONTAIN A PLURALITY OF UNITS OF THE FORMULA -SRS- WHICH ARE DERIVED FROM A DIMERCAPTAN OF THE FORMULA HSRSH IN WHICH THE R REPRESENTS A DIVALENT, ALIPHATIC, POLYCYCLIC RADICAL AS DEFINED HEREINAFTER. THE POLYMERS MAY BE HOMOPOLYMERIC, I.E., -SRS-X OR COPOLYMERIC -SRSY-X IN WHICH X IS THE NUMBER OF REPEATING UNITS AND Y IS THE DIVALENT RESIDUE OF A MONOMER WHICH IS COPOLYMERIZABLE WITH THE DIMERCAPTAN.
Inventors
- 👤 George Lewis Brode
- 👤 Timothy Lee Pickering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3876; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08G75/00; C08G75/02; C08G75/0204; C08G75/0245; C08G75/04; C08G75/12; C08G75/14; C08G75/26; C08G75/28; C08L; C08L63/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |