US2883275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of removing material from a work piece
Assignee: Turco Products Inc
•
Filing: 1955-04-08
•
Granted: 1959-04-21
•
Expires: 1975-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Fairbanks C Hirdler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:53
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/04; C; C23; C23F; C23F1/00; C23F1/02; C23F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF REMOVING MATERIAL FROM AN INTERNAL SURFACE ADJACENT AN APERTURE IN A WORK PIECE, WHICH COMPRISES INSERTING A FLEXIBLE TUBULAR GUARD MEMBER IN SAID APERTURE IN TIGHT BUT MOVABLE ENGAGEMENT WHICH SAID INTERNAL SURFACE, CONTACTING SAID WORK PIECE WITH A CHEMICAL ETCHING SOLUTION, MOVING SAID TUBULAR GUARD MEMBER RELATIVE TO SAID INTERNAL SURFACE TO EXPOSE SUCCESSIVELY VARYING PORTIONS OF SAID SURFACE TO SAID ETCHING SOLUTION, AND CONTACTING SAID SUCCESSIVELY VARYING INTERNAL SURFACE PORTIONS WITH SAID ETCHING SOLUTION FOR DIFFERENT TIME PERIODS TO THEREBY VARY THE PERIOD OF ETCHING OF SAID SUCCESSIVE SURFACE PORTIONS BY SAID SOLUTION, AND PRODUCING A NON-UNIFORM ETCH ALONG SAID INTERNAL SURFACE.
Claim 2
Independent Claim
107 words
A METHOD OF REMOVING MATERIAL FROM AN INTERNAL SURFACE ADJACENT AN APERTURE IN A WORK PIECE, WHICH COMPRISES INSERTING A FLEXIBLE TUBULAR GUARD MEMBER IN SAID APERTURE IN TIGHT BUT MOVABLE ENGAGEMENT WHICH SAID INTERNAL SURFACE, CONTACTING SAID WORK PIECE WITH A CHEMICAL ETCHING SOLUTION, MOVING SAID TUBULAR GUARD MEMBER RELATIVE TO SAID INTERNAL SURFACE TO EXPOSE SUCCESSIVELY VARYING PORTIONS OF SAID SURFACE TO SAID ETCHING SOLUTION, AND CONTACTING SAID SUCCESSIVELY VARYING INTERNAL SURFACE PORTIONS WITH SAID ETCHING SOLUTION FOR DIFFERENT TIME PERIODS TO THEREBY VARY THE PERIOD OF ETCHING OF SAID SUCCESSIVE SURFACE PORTIONS BY SAID SOLUTION, AND PRODUCING A NON-UNIFORM ETCH ALONG SAID INTERNAL SURFACE.
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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) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |