US3397976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating refractory draw bar
Assignee: Pilkington Group Ltd
•
Filing: 1964-07-24
•
Granted: 1968-08-20
•
Expires: 1984-07-24
Abstract
No abstract record available.
Inventors
- 👤 Hynd William Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:59
CPC Classifications
C; C03; C03B; C03B5/00; C03B5/16; C03B5/167; C03B5/1672; C03B5/1675; C03B15/00; C03B15/02; C03B15/06; C03B15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US717378A
Cited
US1593566A
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US1739936A
Cited
US1983816A
Cited
US2803925A
Cited
US2950572A
Cited
US3230060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |