US2885370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing polymers of monomeric cyclotrisilazanes
Assignee: Wyeth Holdings LLC
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Filing: 1957-10-03
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Granted: 1959-05-05
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Expires: 1977-10-03
Abstract
No abstract record available.
Inventors
- 👤 Stephen J Groszos
- 👤 Janet A Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:22
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/60; C08G77/62; C08G79/00; C08G79/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
THE METHOD WHICH COMPRISES HEATING, AT A TEMPERATURE ABOVE ITS MELTING POINT, AN UNDISSOLVED, PERFORMED MONOMERIC COMPOUND REPRESENTED BY TEH GENERAL FORMULA
Claim 2
Independent Claim
22 words
THE METHOD WHICH COMPRISES HEATING, AT A TEMPERATURE ABOVE ITS MELTING POINT, AN UNDISSOLVED, PERFORMED MONOMERIC COMPOUND REPRESENTED BY TEH GENERAL FORMULA
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |