US3548337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary devices and apparatus
Assignee: National Research Development Corp UK
•
Filing: 1967-03-13
•
Granted: 1970-12-15
•
Expires: 1987-03-13
Abstract
No abstract record available.
Inventors
- 👤 John William Charles Gates
- 👤 Roy Geoffrey Noel Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:18
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/11; H01S3/1123; H01S3/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE25227E
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US1006230A
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US3012471A
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US2942514A
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US3316348A
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US3398379A
Cited
US3365678A
Cited
US3217623A
Cited
US3434073A
Cited
US3350156A
Cited
US3370176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |