US3537288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing self-tapping screws
Assignee: P D ROBERTSON Mfg CO Ltd
•
Filing: 1968-08-05
•
Granted: 1970-11-03
•
Expires: 1988-08-05
Abstract
No abstract record available.
Inventors
- 👤 Carl H Ansingh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
B; B21; B21H; B21H3/00; B21H3/02; B21H3/027; F; F16; F16B; F16B25/00; F16B25/001; F16B25/0021; F16B25/0036; F16B25/0042; F16B25/0057; F16B25/0063; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10S411/938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2165009A
Cited
US2293930A
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US2414870A
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US3192819A
Cited
US3195156A
Cited
US3258797A
Cited
US3246556A
Cited
USRE26518E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-02 | 1974-05-04 | 1974-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-02 | 1978-05-04 | 1978-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-02 | 1982-05-04 | 1982-11-03 | $7700.00 | Window Closed / Lapsed |