US3249990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a door knob
Assignee: Schlage Lock Co LLC
•
Filing: 1962-05-02
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Granted: 1966-05-10
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Ernest L Schlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:24
CPC Classifications
E; E05; E05B; E05B1/00; E05B1/0007; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49599; Y10T292/00; Y10T292/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF PROVIDING A DOOR KNOB COMPRISING FORMING A HOLLOW DEFORMABLE BODY HAVING A APPROXMATELY GLOBULAR PORTION AND HAVING A CYLINDRICAL SHANK MERGING WITH SAID GLOBULAR PORTION, SUPPORTING SAID BODY SOLELY BY ENGAGEMENT WITH SAID SHANK, AND WHILE SAID BODY IS SO SUPPORTED ABUTTING DIAMETRICALLY OPPOSITE PARTS OF SAID GLOBULAR PORTION WITH THE PLANAR PARALLEL FACES OF OPPOSITE DIAMETRICALLY ALIGNED PLUNGERS AND THEN FORCING SAID PLUNGERS SIMULTANEOUSLY INWARDLY TOWARD EACH OTHER UNTIL PERMANENT SPHERICAL CONCAVITIES OF LESSER EXTENT THAN SAID PLANAR FACES ARE FORMED IN SAID GLOBULAR PORTION.
Claim 2
Independent Claim
89 words
A METHOD OF PROVIDING A DOOR KNOB COMPRISING FORMING A HOLLOW DEFORMABLE BODY HAVING A APPROXMATELY GLOBULAR PORTION AND HAVING A CYLINDRICAL SHANK MERGING WITH SAID GLOBULAR PORTION, SUPPORTING SAID BODY SOLELY BY ENGAGEMENT WITH SAID SHANK, AND WHILE SAID BODY IS SO SUPPORTED ABUTTING DIAMETRICALLY OPPOSITE PARTS OF SAID GLOBULAR PORTION WITH THE PLANAR PARALLEL FACES OF OPPOSITE DIAMETRICALLY ALIGNED PLUNGERS AND THEN FORCING SAID PLUNGERS SIMULTANEOUSLY INWARDLY TOWARD EACH OTHER UNTIL PERMANENT SPHERICAL CONCAVITIES OF LESSER EXTENT THAN SAID PLANAR FACES ARE FORMED IN SAID GLOBULAR PORTION.
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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) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |