Michael A Todd

US Patent:

6674928, Jan 6, 2004

Filed:

Jul 31, 2001

Appl. No.:

09/917643

Inventors:

Gregg A. Johnson - Fairfax VA
Michael D. Todd - Alexandria VA
Bryan L. Althouse - Davidsonville MD
Chia-Chen Chang - Rockville MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G02B 600

US Classification:

385 12, 385 13, 385 14, 385 37

Abstract:

A new optical sensing device containing fiber Bragg gratings, a scanning bandpass filter, an interferometer and multiple photodetectors is disclosed. The present invention also describes a new system and method for fibre Bragg grating (FBG) sensor interrogation and multiplexing. The new system combines a scanning Fabry-Perot (SFP) bandpass filter used to wavelength-multiplex multiple gratings in a single fiber, and an unbalanced Mach-Zehnder fibre interferometer made with a 3Ã3 coupler to detect strain-induced wavelength shifts. A passive technique for interferometer drift compensation using non-sensing FBGs is included in the system. A complete prototype system interrogates four gratings in a single fiber at a Nyquist sampling rate up to 10 kHz, with a noise floor measured near 4 n Hz above 0. 1 Hz. The inclusion of the interferometer drift compensation technique is shown to make quasi-static measurements feasible.

US Patent:

20210032141, Feb 4, 2021

Filed:

Jul 28, 2020

Appl. No.:

16/940498

Inventors:

- Wilmington DE, US
Michael A. Todd - Wilmington DE, US

Assignee:

SOLENIS TECHNOLOGIES, L.P. - Wilmington DE

International Classification:

C02F 5/12

Abstract:

Industrial water such as in a geothermal unit is stabilized against silica polymerization and flocculation by using a combination of inhibitors including a nonionic polyether and a monomeric polycarboxylate.

US Patent:

20200063017, Feb 27, 2020

Filed:

Aug 23, 2018

Appl. No.:

16/110221

Inventors:

- Wilmington DE, US
Michael A. Todd - Wilmington DE, US

Assignee:

SOLENIS TECHNOLOGIES, L.P. - Wilmington DE

International Classification:

C09K 8/528
C09K 8/54
C23G 1/08
C23F 11/04

Abstract:

A method of removing mineral scales from a substrate with minimized corrosion of the substrate includes the steps of providing an acid solution providing a corrosion inhibitor solution, applying the acid solution to the substrate to remove mineral scales therefrom, and applying the corrosion inhibitor solution to the substrate to minimize corrosion thereof. The acid solution includes a mineral acid, an organic acid, or a combination thereof. The corrosion inhibitor solution includes an alpha-beta unsaturated aldehyde, a hydrophobic amine, and an oxime. The corrosion inhibitor solution optionally includes formic acid, a surfactant, and a solvent.