US2717203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing aperture in hollow article
Assignee: Hartford National Bank and Trust Co
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Filing: 1953-05-29
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Granted: 1955-09-06
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Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jan Anton Willem Van Laar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:54
CPC Classifications
C; C03; C03B; C03B23/00; C03B23/26; F; F42; F42B; F42B33/00; F42B33/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A METHOD OF MAKING HOLLOW ARTICLES FURNISHED WITH AN APERTURE, COMPRISING, FILLING THE CAVITY OF THE ARTICLE WITH A LIQUID, PLACING THE ARTICLE IN A LIQUID ETCHING BATH UNTIL THE LIQUID FLOWS FROM SAID CAVITY INTO THE ETCHING BATH AFTER AN APERTURE HAS BEEN FORMED BY ETCHING.
Claim 2
Independent Claim
47 words
A METHOD OF MAKING HOLLOW ARTICLES FURNISHED WITH AN APERTURE, COMPRISING, FILLING THE CAVITY OF THE ARTICLE WITH A LIQUID, PLACING THE ARTICLE IN A LIQUID ETCHING BATH UNTIL THE LIQUID FLOWS FROM SAID CAVITY INTO THE ETCHING BATH AFTER AN APERTURE HAS BEEN FORMED BY ETCHING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |