US3337487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive end-group polymers and preparation thereof
Assignee: Hercules LLC
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Filing: 1963-07-29
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Granted: 1967-08-22
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Expires: 1983-07-29
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
C; C08; C08L; C08L77/00; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/135; C07C43/137; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/4009; C08G18/4081; C08G18/48; C08G18/4804; C08G18/4825; C08G18/4833; C08G18/4837; C08G18/4854; C08G18/4866; C08G18/487; C08G18/4875; C08G18/4879; C08G18/52; C08G18/64; C08G18/6415; C08G18/6423; C08G18/67; C08G18/6795; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08G63/00; C08G63/66; C08G65/00; C08G65/02; C08G65/32; C08G69/00; C08G69/40; C08G73/00; C08G73/02; C08G73/0206; C08G75/00; C08G75/02; C08L63/00; C08L81/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE PROCESS OF CLEAVING A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHERS, POLYTHIOETHERS, AND POLYIMINES COMPRISING REACTING SAID POLYMER, AT A TEMPERATURE OF ROM ABOUT -50*C. TO ABOUT 200*C., WITH AN ORGANOMETALLIC COMPOUND OF AN ALKALI METAL WHEREIN THE ORGANO MOIETY IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKENYL, ALKYNYL, CYCLOALKYL, CYCLOALKENYL AND ARALKYL, SAID POLYMER BEING CLEAVED CONTAINING SEQUENCES OF AT LEAST 2 MONOMER UNITS HAVING THE FORMULA
Claim 2
Dependent Claim
72 words
THE PROCESS OF CLEAVING A POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYETHERS, POLYTHIOETHERS, AND POLYIMINES COMPRISING REACTING SAID POLYMER, AT A TEMPERATURE OF ROM ABOUT -50*C. TO ABOUT 200*C., WITH AN ORGANOMETALLIC COMPOUND OF AN ALKALI METAL WHEREIN THE ORGANO MOIETY IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, ARYL, ALKENYL, ALKYNYL, CYCLOALKYL, CYCLOALKENYL AND ARALKYL, SAID POLYMER BEING CLEAVED CONTAINING SEQUENCES OF AT LEAST 2 MONOMER UNITS HAVING THE FORMULA
References Cited (Backward Citations)
US2919262A
Cited
US3201367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-21 | 1971-02-20 | 1971-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-21 | 1975-02-20 | 1975-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-21 | 1979-02-20 | 1979-08-22 | $7700.00 | Window Closed / Lapsed |