Description
Class C07D : HETEROCYCLIC COMPOUNDS
Subclass 201/12: Preparation, separation, purification, or stabilisation of unsubstituted lactams Preparation of lactams by depolymerising polyamides
C07D 201/12
Sub-Class
Stats
- 16 US PATENTS IN FORCE
- 2 US APPLICATIONS PENDING
- 8 Total Patent Owners
- 79 TOTAL INVENTORS
Recent Patents
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 11827591 | Compositions and methods of preparation thereof | Oct 29, 21 | Nov 28, 23 | aPEEL Technology Inc. |
| 6020486 | Depolymerization of polyamides | Jul 14, 98 | Feb 01, 00 | 3M INNOVATIVE PROPERTIES COMPANY, DSM IP ASSETS B.V., |
| 5990306 | Process for the purification of caprolactam obtained from the depolymerization of polyamide-containing carpet | Sep 03, 97 | Nov 23, 99 | SHAW INDUSTRIES GROUP, INC. |
| 5948908 | Process for depolymerizing polycaprolactam processing waste to form caprolactam | Mar 18, 96 | Sep 07, 99 | SHAW INDUSTRIES GROUP, INC. |
| 5932724 | Process for depolymerizing nylon-containing waste to form caprolactam | Apr 16, 97 | Aug 03, 99 | DSM N.V., SHAW INDUSTRIES GROUP, INC., |
| 5929234 | Process for depolymerizing nylon-containing whole carpet to form caprolactam | May 21, 98 | Jul 27, 99 | DSM N.V., SHAW INDUSTRIES GROUP, INC., |
| 5869654 | Process for depolymerizing polycaprolactam processing waste to form caprolactam | Apr 18, 97 | Feb 09, 99 | SHAW INDUSTRIES GROUP, INC. |
| 5681952 | Process for depolymerizing nylon-containing waste to form caprolactam | Dec 08, 95 | Oct 28, 97 | DSM IP ASSETS B.V., SHAW INDUSTRIES GROUP, INC., |
| 5668277 | Depolymerization of polyamides | Apr 15, 96 | Sep 16, 97 | DSM IP ASSETS B.V. |
| 5656757 | Monomer recovery from multi-component materials | Aug 10, 95 | Aug 12, 97 | SHAW INDUSTRIES GROUP, INC. |
| 5556890 | Reclaiming .epsilon.-caprolactam from carpet waste | Jun 02, 94 | Sep 17, 96 | DSM IP ASSETS B.V. |
| 5457197 | Monomer recovery from multi-component materials | Apr 08, 94 | Oct 10, 95 | AlliedSignal Inc. |
| 5310905 | Conversion of nylon 6 and/or nylon 6,6 to monomers | Apr 14, 93 | May 10, 94 | INVISTA NORTH AMERICA S.A.R.L. |
| 5294707 | Semi-continuous depolymerization of nylon 6 polymer | Feb 25, 93 | Mar 15, 94 | BASF CORPORATION |
| 5241066 | Method of recovering caprolactam from mixed waste | Jun 25, 92 | Aug 31, 93 | BASF CORPORATION |
| 5216149 | Controlled catalytic and thermal sequential pyrolysis and hydrolysis of mixed polymer waste streams to sequentially recover monomers or other high value products | Jun 07, 91 | Jun 01, 93 | ALLIANCE FOR SUSTAINABLE ENERGY, LLC |
Recent Publications
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0100,965 | SEPARATION OF IMPURITIES IN A PROCESS FOR HYDROLYTICALLY DEPOLYMERIZING A POLYAMIDE | Mar 30, 23 | Mar 27, 25 | Not available |
| 2024/0092,719 | COMPOSITIONS AND METHODS OF PREPARATION THEREOF | Oct 10, 23 | Mar 21, 24 | Not available |
Top Owners in This Subclass
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Patents Issued To Date - By Filing Year
Average Time to Issuance
- 20 Months (last 2 years Issuances)
- 20 Months (last 5 years Issuances)