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SEC Edgar

Birchtech Corp.

SIC 3829 · Measuring & Controlling Devices, NEC
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$BCHT

Birchtech Corp.

CIK:0000728385|SEC Filings

INDENTURES

EX-4.1
meec_ex41.htm
2026-03-31T00:00:00Z
EX-4.1
meec_ex41.htm
2025-03-31T00:00:00Z
EX-4.1
meec_ex41.htm
2020-05-14T00:00:00Z
EX-4.4
v071689_ex4-4.htm
2007-04-17T00:00:00Z
EX-4.2
v060188_ex4-2.txt
2006-12-13T00:00:00Z
EX-4.1
v060188_ex4-1.txt
2006-12-13T00:00:00Z
EX-4.3
v060188_ex4-3.txt
2006-12-13T00:00:00Z
EX-4.4
v060188_ex4-4.txt
2006-12-13T00:00:00Z
EX-4.5
v060188_ex4-5.txt
2006-12-13T00:00:00Z
EX-4.6
v060188_ex4-6.txt
2006-12-13T00:00:00Z
EX-4.3
v050966_ex4-3.txt
2006-08-21T00:00:00Z
EX-4.1
v050966_ex4-1.txt
2006-08-21T00:00:00Z
EX-4.3
v050966_ex4-4.txt
2006-08-21T00:00:00Z
EX-4.5
v050966_ex4-5.txt
2006-08-21T00:00:00Z
EX-4.2
v050966_ex4-2.txt
2006-08-21T00:00:00Z
EX-4.1
v040170_ex4-1.txt
2006-04-10T00:00:00Z
EX-4.2
ex_4-2.txt
2006-01-05T00:00:00Z
EX-4.1
ex_4-1.txt
2006-01-05T00:00:00Z