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Inventor

Allon C. Day

Inventor
Low Worsall, GB

Overview

3→
Patents
1980–1990
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C04Bprimary
C04BLime, magnesia22%
F27BFurnaces, kilns, ovens or retorts in general22%
F27MIndexing scheme relating to aspects of the charges or furnaces, kilns, ovens or retorts22%
F16JPistons11%
F26BDrying solid materials or objects by removing liquid therefrom11%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
PatentTitleYear
4,906,183'Treatment of expansible materials to form lightweight aggregate'19904,728,471'Treatment of expansible materials to form lightweight aggregate'19884,199,155'Sealing means for rotary vessels'1980

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1980Patents assigned to HEAD WRIGHTSON & CO LTD (1)· patent assignee history
1980–1988Based in Low Worsall, GB· patent location history
1988–1990Patents assigned to GREAVES & SONS LTD (2)· patent assignee history
1990Based in Yarm, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GREAVES & SONS LTD21988–1990
HEAD WRIGHTSON & CO LTD11980
Locations
LocationPatentsSpan
Low Worsall, GB21980–1988
Yarm, GB11990